Ive sold quite a few on there - mainly lower value bangers for about £500
I have found a higher percentage of time wasters and no shows with auctions ending on Friday or Saturday which is not that surprising as alcohol consumption is usually higher on these nights. The last couple I have scheduled for Sundays at around 6pm and this worked OK.
Its hard to predict things on eBay though as there are some crazy people on there these days. When it first started it was great, lots or bargains and most people were sensible. Well that how I found it anyway.
You might be better off with Gumtree. Just a thought.