$50 holley carb?

I've got a chance to buy a 650 cmf Holley double pumper carb from a guy nearby and was wondering if it seems like a good deal. It does to me, he says it works and 50 bucks just seems too sweet to pass up.

I dont have a part # yet but I'll get one.

he's also got an 800cmf double pumper that he says works and some roller rockers for a 440.
if anyone's interested i'll slide you his contact info