Massdrop offers the APPJ Mini 2013 Mini Tube Amplifier in Black for $89.99 plus $9 for shipping. That's tied with our September mention as the lowest total price we've seen. (It's the best deal today by $80.) Designed for powering small desktop speakers, it features two 6J1 driver tubes, two 6P1 power tubes, and three watts per channel into two channels at 8 ohms. Deal ends May 22.

Note that it will ship June 11.