eBay has the Microsoft Surface 3 10.8" 64GB Atomx7 Windows 10 8MP Wi-Fi Tablet PC (7G5-00001) refurbished for $250 with free shipping. Retail price: $499. Features Windows 8.1, 10.8 inches Display, Quad Core Intel Atom x7-Z8700 processor (2MB Cache, 1.6GHz with Intel Burst™ technology up to 2.4GHz), 2 GB RAM Memory, 64 GB Flash Memory (37 GB Available), 1.37 pounds.
Has good Amazon Reviews.
Microsoft Store has the NuVision Solo 10 Draw 32GB 10.1" Windows Tablet (Blue, TM101W610LBL; Pink, TM101W610LPK or Silver, TM101W610L) for $149 with free shipping. Retail price: $249. Features 10.1-inch Full HD touchscreen, Intel Atom x5-Z8300, 2GB memory/32GB eMMC, up to 6 hours battery life
Includes stylus and sleeve.
Best Buy has the Apple iPad mini 4 128GB WiFi Tablet in several colors (Space Gray pictured) for $300 with free shipping. List price: $400. Features 7.9" Retina display (diagonal) with anti-reflective coating, touch ID fingerprint sensor, A8 second-generation chip, 8MP iSight camera with 1080p video, facetime HD camera.
Best Buy has the Apple iPad Pro 10" 32GB WiFi Tablet (Gold) for $475 with free shipping. List price: $600. Features 9.7" retina display with anti-reflective coating, A9X third-generation chip with 64-bit desktopclass architecture, touch ID fingerprint sensor, 12MP iSight camera with 4K video, 5MP FaceTime HD camera.