Came across this link today and I found it interesting. I would not say it sets prices in stone, but it is a decent guide.

http://www.bostonpinball.biz/PriceList112407.htm

Flat. Now the question is what are the machines making up the volume of sales? A's B's EM's etc.

I don't know if it is just my browsing habits but I am not looking at as many A list pinballs being offered on Ebay lately other than the standard resellers that are asking for the moon for them.

If it were mostly non A list titles then that would indicate the market is moving up without the high dollar ones in the mix.