Only problem I have is the shipping choice.
Like my work, it's probably a good bulk discount for them but not for the buyer.
FedEx is slow and pricey. A USPS P-Mail 8 dollar car is over 13 bucks using FedEx.
In some cases - I am in the next State and it has taken 7 to 10 days to get the items. With FedEx, you never know what time of day they will show up. FedEx also hands off the box to USPS ground and the box travels all over the place before you get it.
As for ebay, I generally only buy cars not engines on there.