Hold on, let me get this straight. You want them to cater to your demands, and send you a brand new module for a used module? Obviously your motherboard supports ECC ram if it works, so your only complaint is that it is slower? So wait, if I order an Athlon T-Bird from some place online, and then 3 months later decide an Athlon XP works in my board too, but is actually faster, then I can complain and they have to send it to me? Crucial didn't rip you off for anything. You ordered 256MB of ECC ram and you got 256MB of ECC ram.