Online especially for flexwatt/heating stuff www.reptilebasics.com (tell Rich BPNet sent you LOL)

For bedding I go to WalMart or TSC but never pet stores since they seem to overcharge on their stuff.

For hides and such I hit the dollar store and get inventive.

For racks we build our own (tons of plans and examples here on this site and all over the web). Tubs we buy from WalMart (employee discount - gotta love it!).

For feeder rodents, we breed and raise our own and make their housing ourselves out of big plastic storage bins.