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.
Ends 7/31. GearBest has the Chuwi 10" Android/Windows Tablet w/ Keyboard (Gray) for $186 with free shipping. Features a 10.1" 1200x1920 touchscreen LCD, Intel Atom x5-Z8350 1.44GHz Cherry Trail quad-core processor, 4GB RAM, 64GB internal memory.
Staples has the Apple iPad Pro 10.5" 64GB WiFi Tablet (Space Gray, Silver, Gold, or Rose Gold) for $599 with free shipping. List price: $649. Features 10.5" Retina display, A10X Fusion chip with 64-bit desktop-class architecture, touch ID fingerprint sensor, 12MP camera with 4K HD video, 7MP FaceTime HD camera.
Microsoft has the NuVision Solo 10 Draw 32GB 10.1" Windows Tablet (Blue, TM101W610LBL; Pink, TM101W610LPK or Silver, TM101W610L) for $99 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.