valid questions................... I find CL to be lots of scams, but I do advertise on there anyway. sometimes you get lucky.
good point on ebay. they tell you you can relist for free with a deadbeat buyer, but then they double charge you. they are bastards..............but- every time I list a few cars, I do tend to sell one or two. they are far from fault and how they handle their site, but the exposure is superior to the other sites.
I just sold a model a chassis and parts on ebay. the buyer saw it on cl, but decided to bid on ebay at the last minute. I dont know why, but thats how it went down. He came and paid me a few days later. so a combination of listings made that sale.
I have also listed here and find it useless and Ford Barn and HAMB. In the end, I think the multiply exposure doesnt hurt and expectations should be low, so then there are no disappointments.
ebays costs are high, but I only list cars. Long done with selling parts where they nickel and dime you to death.