Need to enlarge my business!

So after buying my car, I really feel like I need to somehow enlarge the size of the business that I'm doing.

I'm making good money for the time I spend, but definately not enough to spend on all my goods.

I need to make good 1000 dollars per month, but currently I'm making only about half of that.
I need to come up with some brilliant idea for this..  hmmm......
Maybe I should start focusing on repairing than selling, since by repairing I have nothing else to lose.

Updates- lenovo m17z all in one desktop.
This is a wall mount pc, I thought many people were looking for one, but apparently not.
I put it on cl, ebay, kseattle but only 1 person contacted me so far.. and he wanted a trade..