eBay has the Diamondback 2017 Recoil 29er Mountain Bike Silver (16"/Small, 18"/Medium or 20"/Large) for $420 with free shipping. Retail price: $600. Has good Amazon Reviews.
Amazon has the Akaso Men's Orthrus Sun Cap and Baseball Cap (3 color options) for $20.99 - $12.59 off with coupon HTYBKI8G = $8.4 with free shipping on $25+ or with Prime. It is made of 100% quick-drying and ultralight polyester, sun cap features UPF 50 protection.
Has excellent Amazon Reviews.