Practically speaking you'll spend several hundred a year on moassel and coals so it's stupid to try and save a few bucks on a narghile. The cheapest you'll find for anything worth owning is around $80. Don't by some crap made by Mya or something else from China. Get a good product from Syria or Egypt. I'd recommend Syrians from: www.hookahguys.com
Get something that will perform well and last many years. You'll be glad you did.