Give the ad's location, I'd say you need a hub motor capable of generating a fair amount of torque for hill climbing. I'm not sure that the generic hub motor on this bike is the right candidate. It's also installed on a front suspension fork, which if the fork is aluminum, is a big safety no-no, especially since I don't see torque arms. The fact that the bike only has 3 gears, may also cause some disappointment since you'll be pedaling, too. I'd say the price is too high for what you're getting.

FYI--You can get a similar, generic e-bike brand new for less. http://shop.vendio.com/remo032/item/.../?s=1263113762 However, not knowing the specifics on your commute, size and if you're planning on pedaling, I'm not sure what's a better match for you.