decent looking mountain bikes for $75.
You do get what you pay for.
I dont have a dog in this fight but this is a perfect opportunity to offer a little bit of personal experience. I paid $150 for a 'decent mountain bike' at one of these department stores for my kid, and within 2 weeks the pedal stripped off. Not being a bike expert when I bought it, i had no idea that i should check the pedal so see if it was crossthreaded. It takes a little experience and mechanical dexterity to put it on without crossthreading it. For that profit margin i really dont expect lance armstrong to put it together.
I took it back and got a full refund, took the same money to a custom bike shop and paid an extra 100 bucks for a decent bike that was put together by people who cared about what they were doing.
I've got nothing against walmart, i shop there all the time. There are some things that you dont buy there. Like Sushi. Never buy Sushi at Walmart. (except perhaps in japan)