Try making a USP-S
False,
http://mjh.at/csgostats/
http://www.schuzak.jp/cs-go/dmgchart.html
as you can clearly see UMP is no only cheaper than the MP7, it also has the greatest damage per shot of any SMG and the highest DPM of any SMG against unarmored enemies. Against armored enemies the P90 takes the top slot but UMP is still second and still significantly less expensive. The only reason not to use the UMP is the low mag capacity or you want a P90 instead. So basically, it blows as a late game weapon but is THE best early game SMG.
Anyway the skins look really nice so far, hope they make it to the game