Search, search, search. Craigslist is actually great for that. You can sometimes find a glider that comes with a good sized cage. For just a glider, you can find one for 80-100 cheapest if you look for it, and you might have a drive awhile. Look for rescues. Just google it, there's a few sites that may have some. I don't know how little you can spend, but there's this great cage on sale on exotic nutrition's website for $169. It's the Madagascar cage and everyone who uses it loves it. The cage lasts their whole life really and that would be big enough for two or more so if you can afford that, it's a good idea. But if your glider seems happy you don't have to jump at the first glider you find that's cheap. See if you can find one that comes with a cage- make sure it's actually good sized, or else it isn't worth it. Then you can offer to pay less for JUST the glider, and go get your own cage. Good luck!! (Exotic Nutrition also has a 10% off coupon right now that expires the 25th. I can send you the code. The cage is on sale and there's 10% off additionally. So that would be a really good thing if you can do it!)