i did retail and if ur good u get alot of commission (if they offer) and bonus from selling certain products. Just from selling old phones u can get up to 200 from just selling that phone and about 20 bucks per phone subscription and stuff. Easy money. i was making 600-1000 every 2 weeks part time
another one is cell phones because thats were all the money is if u want to sell. U get alot from activations/upgrades and selling services.