Amazon offers the PlayStation TV for $79.99 with free shipping. That's the first discount we've seen for the PlayStation TV, which was just released last month, and the best total price we could find by $20. It allows you to play a selection of PS Vita, PSP, and PS One games via purchase at the PlayStation Store, stream PS3 games via the PlayStationNow Network, act as a second console to stream PS4 games from a PS4 console, or stream movies, TV shows, and more. It features a PS Vita cartridge slot (not all games are compatible) and requires a DualShock 3 or 4 controller (not included.)
Note that a bundle with a DualShock 3 controller, 8GB memory card, and digital voucher for The LEGO Movie Video Game is also available for $99.99. That's the lowest total price we could find by $35.
Update: As a reader found, B&H Photo Video offers it for $77.99 with free shipping.