reptiledirect.com - has the best prices and excellent service. They've even got nice shipping options, which some other places don't really offer. If you just need general herp supplies, this is an excellent way to stock up to save on shipping.
petguys.com - also has fantastic prices and speedy service, but they don't specialize in just herp supplies so you may not be able to find all that you need. They've still got cheap UTHs and rheostats though, so you should check them out!
thebeanfarm.com - is excellent! I like shopping from them because they've got a more personal touch to their service. If you have questions about what you should buy, they can actually answer your questions. This is where you can find more specialized herp supplies like breeding equipment, heat tape, medical supplies, cleaning solutions, etc.
revivalanimal.com - doesn't have herp stuff at all, but they've got the best prices (that I can find) for Albon, Panacur, Pyrantel Pamoate, etc. They also sell the 1cc oral syringes for feeding medicine.
To be honest, I wasn't really impressed with lllreptile.com. You're not really saving much by buying supplies from them, and the shipping wasn't that great.
I think those are all the places I've shopped at, unless you count petsmart.com.
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chickabowwow

3.2.3 leopard geckos (Rosie, Locke, Lisa, Caesar, Tommy)