If your wheels are pristine (absolutely no rashes) then you'll get more for your wheel one at a time on ebay (Not as a set). As far as tires, good luck. Used tires have very little value. 50% tread left to me means they'll need replacing in 5-7k miles.
I would personally ride the tires out until replacements are needed. Then get the wheels you want. At least you don't have to worry about TPMS sensors since it's an 06.