Learn to solder. It's a requirement if you're going to stay in the hobby. Not only will it save you money doing it yourself, you won't have to wait for a shop to do it or shipping for some extra-resistance-adding adapter.
Also, absolutely love my rc Gearshop motor as well. I've got the 2150kv one for my 8th buggy and the thing runs great. Powerful and fast, runs cool.
at $10 I guess this might be worth the hassle of not using the iron.
Not trying to derail the thread from the topic but.
My blue can GoolRc motor has super short wires on it too, and I made some of these wires with bullets on them to extend the length to reach to my Castle SCT esc in my Ruckus. Is there a better way to do this?
Ecx 2wd Ruckus
Traxxas Stampede XL-5
Traxxas Summit 1/10