Depends what you mean by layouts. I have seen bulk lots of stuff on Creigs list were the seller has a reasonable price but you have to take it all. Great deal for someone who has little to noting, not so much for those looking for a few key items. You do need to check the condition of everything. When buying a layout I look at it as follows: what are the sum of the parts worth? For example, Athearn Blue Box locomotives I estimate at $20 each, $10 per Tortoise switch machine, rolling stock $2-$5 a piece, buildings very little (prefer to build my own), and so on. Track is a pain if it must be removed and relaid, especially if it has been ballasted.