I bought a cheap bike from walmart and the handle bar stripped out.
If I buy another one from there it will be a name brand. I was thinking the other day about getting a moped. Seeing one car is down and another needs a little work and only uses premium that moped may be on the road in a few weeks. 
What "name brand" do they sell at Wal-Mart, Mongoose? Schwinn? Both of those companies are hardly a shell of what they use to be and they're both owned by a huge monopoly called Dorel, which also owns GT, Dyno, Cannondale

and a few other classic brands.
The stuff that gets distributed to Wal-Mart is junk. J-U-N-K.
Again, if you want something decent and some service to back it up, Performance Bike is your answer (or another local bike shop).
As far as the moped idea, check with your state laws about riding them on the road. If, like here in DE, you need to have a motorcycle endorsement, move up to a small scooter, at least.
btw: My scooter is 500cc's of
