Amazon.com: Logitech K400 Plus Wireless Touch With Easy Media Control and Built-in Touchpad, HTPC Keyboard for PC-connected TV, Windows, Android, Chrome OS, Laptop, Tablet - Black : Electronics
920-007119 Logitech K400 Plus Wireless Touch HTPC Keyboard for PC Connected TVs
Logitech K600 Smart TV Keyboard, PC & HTPC with D-Pad
IMO, the best cheap HTPC keyboard with a trackpad. The Rii K22, for like 20 dollars on Amazon, is a steal in quality and comfort : r/htpc
Amazon.com: Wireless Keyboard with Trackball Mouse, 2.4G Handheld Multimedia Keyboard Built in Trackball, Scroll Wheel & Hotkeys for HTPC, TV Box, Laptop, Desktop, Compatible with Windows, Mac, Android (Black) : Electronics
Amazon.com: Arteck 2.4G Wireless Touch TV Keyboard with Easy Media Control and Built-In Touchpad Mouse Solid Stainless Ultra Compact Full Size Keyboard -Connected Computer, Smart TV, HTPC : Electronics