Your worse than me! Though I did grab a few of those Hydrapacks off there, one for biking last year and a smaller one for hiking, very nice packs. Only other thing I bought was a fixed blade SOG knife the other week since I am paranoid of being attacked by an animal while hiking and it seems the state frowns on packing a pistol on state land...
The Hydrapack I got was only $15, with $0.99 shipping since I added it on another order (the jersey). Whenever I need a new bladder I just buy a new pack at a steep discount. If I don't like the pack itself I just use the bladder in my old pack. It's cheaper than buying a bladder by itself, and I have extra packs hanging around in case I need one.