The original radio isn’t worth $75 delivered… it’s fifteen or sixteen year old technology plus the radio itself is that old. Would you spend $75 on a seventeen year old VCR?
Take a look at Crutchfield, browse around their car receivers, like the Sony CDX-GT630UI for $150:
http://www.crutchfield.com/p_158GT63...I.html?tp=5684
I don’t have this radio but I do have a similar Sony from a couple of years ago in my Toyota. Any purchases over $129 through Crutchfield comes with a free harness, kit (if you need one), and shipping.
It won’t be pre-plugged, but all you need to do is to connect the harness that comes with the radio to the harness they also send you, you can do this at your kitchen table. Solder, or use red butt connectors (which is what I use). Once you have the harness connected to the radio, installing it into your car is maybe a ten minute job, fifteen tops. Really an easy job with this car.
On my car (’95 LE), the amp was internal, I don’t know if the higher trim lines came with external amps or not. If so, not a big deal, just bypass it (I had to do this on a Volvo I once owned).