Dads & Grads at Nordstrom Rack
Store: Nordstrom Rack
Price: Under $50
Shipping: $7.95 s&h, or free shipping w/ $89
As your son graduates from high school, he's also graduating into the proud male tradition of getting the exact same gifts every year: socks, ties, dressing gowns, etc. Teach him this early (while also stocking up on the requisite socks, ties, dressing gowns, etc. for the fast-approaching Father's Day).