Those guys are spot on about forum prices. Dang kids trading there guns the minute the get them for half the cost of them has driven prices down to almost nothing for years.
A trick I found though, is that you can get more if you sell them through a garage sale. Say you can sell it for about 35 bucks here or 50 bucks on ebay, you MIGHT be able to get about 60-70 at a garage sale, if you have an eager kid looking at them. Pawn shop, maybe as well (don't bring up the $200 Sonix
)