As you likely know, people make a lot of decisions based on price. Having different pricing points isn't distracting, it's often the driver for making a decision - as people compare value of an offering to the price of its offer. So no, I don't think you should set all your prices at the same level.

But I do suggest you put prices on them (not just free), as studies on membership sites have shown that even a $1/year price will see 15-25% of previously "free" users leave - meaning that they never had the intention of spending money with you.