in the us at least, all you need to do is to sign for the frame itaelf on a glock which can be got for 50-100 bucks depending on how gucci you want, then get a lower kit that cost 30. the expensive part is the slide which can be from 200-700 and trigger which if you want other than oem can go into 100's. theoretically you can get a glock for 300
United States