ya, the $50 it says as the rebate on the staples site does appear to be a typo.. if you actually click the PDF file of the rebate, it is in fact $30...
Either way, for $89, this printer CAN'T BE BEAT.
its basically running the same ink system as the s750 (which won PC mag best buy, and a bunch of other awards, and i own it myself, it rules).. but the i550 has a more solid design as well as a higher resolution and slightly different(better) ink distribution system, making the photo quality almost as good as that of the s820 (so says my friend that works for canon)...
great printer, and as everyone knows, canon has some of the cheapest ink prices around.. RETAIL is $13.99 for the black (which lasts forever).. compare that to epson or HP that try to stick you for $25-30 per black cartridge that will last a shorter time..
hope that info helped some of you a little..
-Matt