I wouldn't bother with graphic card mining. it cost me about $2000 to build a decent mining rig running x4 R9 280x's. i'm in the process of selling off the graphics cards because it's no longer profitable to mine with them anymore with the increase in difficulty and the drop in price of alt coins across the board you will not even break even.
This right here. And your budget of $275 (as of today's rate) is pretty low when it comes to mining. If you want to actually make a profit, you will need at least 10x that (and that's still got a ton of risk associated with it). I'd just hold the BTC or try day-trading it to increase your holding.