Technical Storing inner tubes

I have some new inner tubes I picked up at a swap meet and want to put them away for "later on". (you can,t buy them around here anymore, not for 5 bux anyways)
Should I put a few pounds of air in them and hang them up, or leave them flat and deflated?

 

Keep them as you bought them. HRP

 

Fill them with argon and deflate them to get rid of the oxygen inside, replace the Schraeder valve and seal them in some type of air-tight bag(s) with additional argon. Maybe vacuum seal them using one of those storage bags that you hook the wife's Electrolux up to. The vacuum sealing machines used for food probably aren't big enough.

 

In your air conditioned house, not in a garage.