Buy any crate gun for coupons?

This is partially a rage thread, (read sig) but wouldn't it be a good idea that you could buy any crate gun for 100 coupons, or maybe even more then that like 150?

This might even make more people buy crates (and ZP, you greedy Z8 people ) if there is a certainty that they can get a gun, and at 100 to 150 coupons, ZP crate guns would still stay rare and desirable.