Amazon has the Gildan Men's V-Neck T-Shirt 5-Pack (GIL1103) for $12 with free shipping on $25+ or with Prime. Lust price: $15. These tees are built to last with durable tubular collar design and covered shoulder seams. Available in select sizes S to XL.
Has good Amazon Reviews.
eBay has the Superdry Men's Gym Tech Slim Sweatpants (Black or Gray) for $20 with free shipping. Available in select sizes S to 2XL.
eBay has the Reebok Men's Training Essentials Woven Pants (Cold Grey) for $12 with free shipping. Available in sizes S to 2XL.