Bought a set of used GT40's on here for $400 and...

did you pay with paypal? you can get your money back...

did you e-mail him and ask for some back?

if you got $100 back i'd call it a decent deal still.

did you pay w/ a MO???

if you paid w/ a money order...then it is internet/ mail fraud

pretty ez to get money back.....but sometimes not worth the hassle.

what does the guy say about it now?

This wont really help you but for all people getting ready to buy gt-40's and p's...you wont save money doing it! Get the more expensive head off the bat. There are always issues with gt-40ps and used 40's and the cost added up leads to the same price as the more expensive head.

Return them and try to get your money back and get some of those cheapy edelbrock aluminum heads instead for the same money.