[931GT]

Any good salesman knows its best to just be courteous and politely decline an any offer they see as too low. Its simple "I appreciate the offer but the lowest I would be willing to go is X amount of dollars". The buyer now knows exactly where you stand and if they are truly interested they will come back with the money.

So "lowball away"... you don't wanna buy from some hothead that can't handle a little negotiation. They probably paid too much and spent too much, and want you to get them out of the hole they've dug themselves into.