Selling My Main with 4000+ GS almost at a 1 year. Has a few full game downloads. Its Master Prestige in Black Ops 2 as for the rest not to sure. The gamertag is not all that great but decent.
I'd keep it tbh man, you'll get more use out of this if its your main account than the bit of money you'll get. Especially if its your original account. GL though