Originally posted by disneysteve
The answer is - you can never know. You can put an item up once and get top dollar for it. Right after that auction ends you can list an identical item and get no bids. Its a very fickle market.
My best sale this week...
I was cleaning out my home office. I came across the owner's manual for the van we totaled 2 years ago (don't know why I even saved it). I listed it for $1.99. It ended today for $34.33! Pretty good for a 2000 model year vehicle, certainly not a classic by any means.
So before you throw anything away, its worth the $.35 investment to list it on ebay.