Aeropostale Men's Aero Varsity Club V-Neck Graphic T-Shirt for $5.99.  Shipping is $7 regardless of how many items you buy from Aeropostale through ebay.  Here is a screenshot for your reference.  In other words, if you buy enough shirts, they become rather inexpensive on a per item basis.  For example, if you buy 7 of these t-shirts, with shipping included, it works out to be just $6.99 each shipped.