Maybe those numbers were accurate in 2009-2010. Today, those boards would fetch far more (assuming anyone ever wanted to sell). $500+ for used, NIB even more I expect, maybe up to $800-900 range. $200-250 is just not realistic at all.
It depends on the market you're selling them on. On GH, I expect SAV/HASRO would fetch around $350-450 NIB, but on other markets I'm sure they could get much more.
SAT wouldn't fetch anywhere near $800-900, even NIB. They usually sell around $350 NIB.
Btw, the boards Signature is talking about are used but very good condition. Except the SAT, which is NIB.