My question generated more interest than I expected.
For Sale posts on Craigslist expire after 7 days I think in the major metro areas of US. However, your post is still in your account and you can renew.
Maybe a similar system could work here and less time would be spent "gaming" the system to get to the top of the list.
If something doesn't sell then the seller will usually lower the price and as was explained, this can be done within the original post. However, who will know that the price was lowered if your ad now is on the 4th page, 88 items from the top of the list?
It seems to me that a genuine and significant change in the price ought to warrant being re-posted without being criticized for "purposefully trying to game the system and go to the top of the list."
