Check Craigslist and Faunaclassifieds for racks in your area. They pop up every few weeks and you can find them really cheap. Ignore the twits that post them for a few dollars less than new. If you're patient you will find real bargains

As an example, I paid $100 for a Reptile Basics sweaterbox rack that was literally brand new and never used. They sell for $300. The person was moving and needed it gone ASAP. That's the exception but you can regularly find used racks in great condition for less than half the cost of new.

Good luck.