I have an old POS Aiwa that I swapped out of the Miata this Christmas It aint pretty but i'd give ya if you're interested.
The backlight is out and the detachable face doesnt work all that well and tends to fall off if you don't put it in solid, but it still makes good sound. If you're in a lit environment and aren't trying to detach the face all the time pr run in a bouncy car it should do you fine. It has RCA outs for a sub, it used to have a JVC 10 with a Kenwood amp in a truck, sounded great.
Let me know if you're interested, i'll dig it out.
Edit: just the HU, I sold the sub and amp.