vinyl stained glass window film; I've used this product myself several times in different patterns, and have absolutely loved the result every time! And of course it's way cheaper than actual stained glass. This particular site has it for $25, but I bought it locally at Home Depot.
A beautiful stained glass window can be used both for privacy as well as for decorative purposes. Instead of opting for stained glass windows which are expensive, how about going for faux stained glass window film?