Proozy offers this adidas Men's Mystery T-Shirt 5-Pack in assorted colors for $69.99. Coupon code "PZY3799" cuts that to $37.99. With free shipping, that's $7.60 per shirt and the lowest price we could find for this quantity by $12, although we saw it for $3 less in October. It's available in sizes S to XL.

Note: These shirts ship in random styles and colors.