Modeltrainsparts has the exact philosophy that I do when it comes to selling.
If you are going to sell it, then sell it. Don't play around with it.
In my other hobby, I see some old guys hauling the same stuff over and over to 3 or 4 shows, instead of pricing it 5 to 10 % below a reasonable price.
I have come to think that most of the folks like this just like going to shows and sitting around all day talking to people, and that the stuff on their table is just window dressing. If some sucker comes along once in a while and pays too much, then they feel like they've made a big score.