Ameritrade charges a flat $10 on your sells and there is NO maintenance fee.  Their website is clear, easy to navigate, and their customer service is helpful.

Here's the link about the pricing:

http://www.tdameritrade.com/straightforwardpricing.html

There's mention on the home page about a 45-day FREE trading period special going on right now.

www.tdameritrade.com

Let me know what stocks you're looking at and maybe we can exchange ideas or thoughts on them.