Ebay offers Adidas Men's Train Essentials Feelready Training T-Shirt for $7 (reg $25) with free shipping.

Product Description:
From push press to push-ups, move through a full range of motion in this adidas training t-shirt. It's cut to allow your arms to move freely overhead. Breathable fabric and moisture-absorbing AEROREADY keep you dry and comfortable as your heart rate rises.