Buy one (1 on sale)
Initially sold for ¥50,000
The Yamaha AM802 is an 8 channel analog mixer with lots of features for its low price. It's an upgrade of the KM802 and has a small 6 channel version called AM602. It has 8 monaural line inputs, 6 of which can be switched to accept a low-level input such as a microphone, and three aux sends with three separate stereo returns. Each channel has a very basic shelving equalizer at 10kHz and 100Hz.
Unlike the AM602, there's no possibility to cascade more than one mixer, but there are additional outputs dedicated to recording.