From the TOS:
You also agree that you will not use this forum to promote other forums including but not limited to ebay and similar websites via the posting of their web address, whether via a hyperlink or via text.
I'm not a lawyer but I know a few and if I have the phrasing correct, it's "the posting of their web address" that is prohibited as that would promote another website. Therefore, suggestions as to search criteria is not directly banned.
Is eBay a forum?
Don't take my word for it, just post a few eBay links and see. 
There are some obvious reasons why you would want to restrict links to eBay. For example, sellers could put up something and promote it excessively.
There are companies and individuals that pay for advertising on this website and they would not appreciate you leading them elsewhere. I've wondered why these advertisers don't chime in more often with their own solutions. They must be very busy and that's good.
I think OGR has done a good job with this forum and maintains a respectable place for anyone to visit. Others that I've seen are not so well behaved. And unless you like being around the type of language that is used in the movies all the time, the restrictions here are refreshing. I just wish they could improve everyone's spelling.
Whether or not direct eBay links are allowed, the practical problem is they go stale after about 6 months. Same problem with eBay listing #'s. So far I seem to have good luck posting images of the listing (that is, they seem to still be around 5 years hence). I figure anyone can use key words of the listing description and find a current listing for the item.
So, for example, if you search for 6-30V timer relay module you'll find the 4-button module for about $3. Also shown is what appears to be a US based seller (California) for a bit more coin. I've noticed Amazon has started listing these eBay electronic modules although you need to carefully read whether they are shipped from within US or coming from Asia. For example enter the same search terms in Amazon and you'll get a dozen or so listings for what appears to be the same 4-button module. Sometimes Amazon listings will have buyer comments, reviews, or Q&A in English which can reveal useful technical information that you won't find in eBay listings.
Anyway, here are the instructions I used for the 4-button module in my example. It can be a challenge to muddle through the poor translation. If you do end up with this particular module and run into problems getting it properly configured, post to this thread and I'll see if I can help.
- Time interval:
0.1 s (minimum) ~ 999 min (maximum) continuously adjustable
how to choose the time interval:
in the selection of parameter set interface mode, and press the STOP button to select the time
xxx. if the decimal point is in some place, the time interval is s-1 999 s
xx. x is decimal place is ten, the time interval is 0.1 s 99.9 s-
x. x. x is the decimal point are all on, the time interval is 1 min-999 min
parameter Introduction: OP power over time, turn off time CL, LOP cycle times (1-999 times, "---" is unlimited cycle)
How to set the parameter:
1. First make sure relay operation mode
2. According to the operaiting relay mode, the main interface (power module will flash current operating mode; standard mode P1.1, then come intot main interface); long press SET key two seconds and then looen enter selection interface mode; by pressing UP, DOWN key to choose the mode setting
(P1.1 ~ P4)
3. After selecting the mode, press short SET to set the corresponding parameter, then the parameter you want to set will flash
(OP power in time; CL power off time; LOP cycle times, "---" is unlimited cycle ); by UP, DOWN to set the parameter value, support long press
(increase or decrease quickly) and press slightly (increase or decrease of 1 unit); after setting the parameter value by short press the STOP key to choose decimal place; choose the time interval (corresponding time interval is 0.1 s-999 min); Short press SET to set the current mode next parameter, the process is the same as above
4. After the setting mode parameter, press and hold the SET button then hold the current configuration mode will flash, then go back to the main interface; define success parameter
main interface: when the relay does not work, it will show "000" (no decimal point); the operating state relay, the screen has a decimal point
Mode Select Interface: press and hold the SET key to enter; after setting, long press the SET button back on main interface
Expansion Function Key STOP:
Activate Relay mode:
1. NO: PO in power over time, relay can be connected
2. OFF: relay is not allowed to connect, when in the off state
in short main interface press the STOP key to achieve turn ON and OFF, current state will flash; then back to the main interface
(this function is a function of sudden stop, 1 key to turn off the relay)
Sleep Mode:
C-P Sleep mode: within 5 minutes, no operation; nixie tube will close auto display, and a function program well
The d-Normal Mode: nixie tube show ever
- Note: Press and hold STOP button for 2 seconds can achieve change from C-P to O-d; Current state will flash and then return to the main interface
Attachments
Images (1)
Of course Stan is right about direct links and eBay product numbers. They do change over time. Better to explain what to look for in as much detail as possible. I will continue to use the numbers where expedience is required. And if they go stale, that's okay. But for the sake of stability, I will also include a good search description. I think that will be within the rules of the forum.
Well the slow boat from China finally arrived, and I got my new 3 button circuit board (I could have sworn I ordered a 4 button???). Of course, there were no instructions, but with the input here and a lot of trial-and-error, I finally got it to program so it works. I had to use P3.1 with L1 =15 seconds (time setting 1) and L2=4 seconds, with 1 cycle programmed.
Thanks to everyone here that chimed in to help!!!!
Dale
Dale K posted:... I finally got it to program so it works. I had to use P3.1 with L1 =15 seconds (time setting 1) and L2=4 seconds, with 1 cycle programmed. .
Yup, that same thing happened to me a while back - received the 3-button instead of the 4-button. To each his own if worth the bother but I complained and the seller refunded me a couple bucks or something like that. It's just that I already had the 3-button version and really wanted to mess with the 4-button version! 
