Sight unseen? Probably $20 total at most. If I saw them though I might pay more for some of them, depending on what they were specifically and their condition.
i agree with troodon. on ebay, i wouldnt bid at all. but off someone i was trading with - i gotta be fair and offer no more then 20-ish.
Me personally, i wouldnt buy without seeing them, at least a picture would be nice. Ive been burned once before on a coin that i got through ebay that was suppose to be VG and when i got it i could barely read anything on it.