I know this sounds Crazy but I would never go 2nd hand, you end up buying someone elses troubles..

With Your Budget, the TT-01 will do fine, Look for a Z-Tune or Coppermix Kit..
You will still need to buy radio gear or Use the Radio gear you already have and transfer it to the TT-01

You can then look at getting a Alloy Prop shaft and Ball Bearing kit for it..