Outlet MP3 via eBay offers the refurbished Logitech Harmony Smart Keyboard Add-On for Harmony Ultimate Hub Remotes, model no. 915-000241, for $29.99 with free shipping. That's $20 under the lowest total price we could find for a new model. This keyboard works with an existing Harmony Hub remote to simplify text entry searches. It includes a one-touch activity control, closed-cabinet controls, and is compatible with most TV-connected devices.
Of note, no warranty information is provided.