About to order wheels for my truck, a few questions

I'm looking at ordering the XD Hoss wheel from 4 wheel parts but I'm not sure what to do with the old stock Tacoma wheels. I'd like to sell them but not sure what to ask, I'd like to get $300 or so. Anyone know what the going rate is? They have about 500 miles on them. Also, my tires have nitrogen in them, will I lose that or do they collect the nitrogen and re-use it?

 

Oh, and it's a TRD off road model if that helps

 

I would not get too worried about losing the nitrogen. The earth's atmosphere is 78% nitrogen, so it's not incredibly valuable

 

LOL, good point