Depends. You can get little pieces at $5 to $10, and elaborate setups up to $50. Gotta tell you though, I've had hamsters and rats with the plastic tube setups and they're a whole lot of fun--until it's time to clean them. As you may know, rodents can't control their sphincters so they poo and wee all over the place, and that includes the little tubes. If you have a whole bunch of them, it's a real pain in the tuckus to clean, especially since your pet will bring pieces of cedar shavings with it into the tubes to create little nests, and that's going to bind with the urine and feces and it'll get stuck in there and the whole thing is going to stink to high heaven until you just soak it all in bleach and then there's pieces of urine-soaked cedar shavings stuck to your sink and GAH!!! I will never do it again. I'd rather get a metal cage with multiple levels, or a whole bunch of toilet paper rolls to play in, cause they'll just chew on those until they're gone and you won't need to clean them.
It depends on the size and the brand. They can cost anywhere from 4-25 dollars.
Its not worth it to get plastic tubes. They get smelly really fast and no matter how much you clean them, there is always going to be a smell associated with it. Just use paper towel rolls-they are much cheaper and when they get soiled all you have to do is throw it out and replace it with another!
