The late-80's vintage Tascam MX-80 can be had for ~$75-~$125,...
[bid price], depending on the day.
It has 8 mic pre's, functions as an 8x2 mic/line mixer, and also has adequate patch points so that each mic pre can be used as seperate 'direct-out' device. Features include TRIM control, Overload LED, 0dbU and -10dbV OUTput [switchable], BALanced AND UNBALanced OUTputs, AUX OUT, LINE OUT, BUSS IN, GAIN & PAN, "Phase Rev", 30db pad/MUTE [switchable], plus phantom power distribution/switchable to each of 8 pre's, but requires an external plugin phantom power supply unit. With a little repatching or an unbal-bal adapter, it may also be used to handle -10dbV line level input signals, if necessary. It's a pretty full featured unit.
See pics.