KC,
I dont mean to sound condescending or rude, but "if you wanna play, you gotta pay"
Upgrading macs is not "cheap", and using prices of windblows/x86 crap as a comparision does not, never has nor will ever be, fair or reasonable.....
Only reason I say this is because alot of your posts seem to included the word "cheap"
Dont get me wrong, I like to find good deals as much as you or anyone else does, but ya gotta face the facts ...........
And NO, I have not seen or heard of any Mac SATA cards less than $50 anywhere. Firmtek is one of the best, and even their older 2 port ones go for around $50, if not more, on ebay and other places.
best of luck to ya in finding one