Dick: the offers from Africa are a form of scam. The "I'll pay you X for it right now you can ignore (and, according to EvilBay, are supposed to ignore). The rest... who knows?
I've seen guitars on there go for more than MSRP... nothing rare, standard production run instruments. Right now, I'm keeping my eyes open for Tiberius Tac8 paintball pistols: MSRP is in the $250 range, and that's pretty much how much they're being offered for at auction: doesn't make much sense to me. I've also seen some stuff that SHOULD go higher go for next to nothing (my $500 + Shuberth helmet for around $100, Spoon's for around $50)...