Problem is though those Chinese Android units seem to have a lot of issues. Sometimes they work but seems like most of the time they don't. If I were to ever go to a route like that I would look at the Stinger setup they have out.
Also check
sonicelectronix. They do everything
crutchfield does when selling a head unit. Free harness, free mounting kit and so on. And shipping is really fast and returns are easy as well. Plus the last couple times I got stuff from there they were cheaper in the end then
crutchfield was on the same head unit by the time any taxes and shipping were added.
For $75 dollars you are not going to get anything decent. Not too mention the time you add in buying a wiring harness and mounting kit. At least with sonic or
crutchfield you will get that included for free. Look to spend at least $125-150 for a Kenwood/JVC, Sony or Alpine. Try to also get something with at least 4v rca's and with 6 channel rca setup so in case you add in a 4 channel amplifier or subwoofer amplifier down the line. Also take a look at
DIYMA for some used head units. Some come up there now and then with really good prices.
What year vehicle, model and trim would help as well for suggestions. Some head units may not fit.