Massdrop offers the Little Dot MKII Tube Headphone Amplifier for $119.99 plus $9.25 for shipping. That's the lowest total price we could find by $4, although most retailers charge $199 or more. It features gold-plated RCA input and 1/4" headphone output jacks, variable gain switch, output load impedance of 32 ohms to 600 ohms, pre-amp output, frequency response range of 12Hz to 100kHz, and internal jumper for aiding tube-rolling. Deal ends October 16.
Note: The expected shipping date is November 9.