A decent GBB for under 60 is hard to find. Although if you're looking for a good NBB look into the Y&P models. The M9 and USP are both very good, but I would recommend the mk23. I owned it for a few years before selling it, but I WISH I hadnt. I miss it. The gun is a beast at 330 fps, but when you add the silencer the inner barrel extension hocks it up to 380-400 fps. Its also very silent compared to a GBB, and the gas economy is way better. The extra clips arent too expensive either, relative to other guns. Its chunky, around the same size as a Desert Eagle, so if you like more compact I'd get the M9 or USP. If not I would highly, highly recommend the Mk23. If you want a good GBB that shoots over 300 I'd be ready to pay at least 100, otherwise stick to NBB for now and get your foot in the door and work your way up. PM me if you want to know anything else.