i know its none of my business, but y would u wanna trade?
and to answer ur question, no its not a ripoff, it would be an equal trade (well aslo depends on other hardware) considering he has a 2200+ which is equvilant (sp) to a p4 2.2 and u have more ram. but in most general applications/games, a computer doesn't really need more than 512 mb ram (unless ur into video editing and all that).
EDIT: stupid spelling mistakes