Should clarify, Sharebuilder Penny Stock Charges
In addition to the base commission ($9.95 for Basic Plan and $7.95 for Advantage Plan), Capital One Sharebuilder will add a $0.007 surcharge per share on market and limit order trades when the average execution price per share is less than $1.00. The total commission (base commission + surcharge) is subject to a maximum of 15% of the principal amount of the trade, but no less than the base commission.
This means that an order with 5,000 shares of any Pink Sheets/OTCBB/penny stock will cost you $45 with Basic Plan and $43 with Advanatage Plan. These are very high rates. It's much cheaper to trade stocks under $1 with one of Top Penny Stock Brokerages.