What kind of stuff? Any pet stuff that you can get from a hardware store or big box store is usually cheaper. Also things that is labeled for something else, but is safe to use for a pet is also usually cheaper then if it were labeled for an animal. The Internet is also one of the best places to look
Depends on what things you mean. Most of my equipment, I get from the hardware store. Most food I get from my garden, and seeds, vitamin stuff I get from tortoise supply or lllreptile