Question is, how long are you planning to keep it?
As long as you don’t have engine issues (lossy compression, oil ⇄ coolant mixing, cracked head, etc.), who cares what the interior/exterior looks like, for 200bux.
If you want to “fix it up”, that’s another issue. I had an ancient Cavalier which got rust bubbles, etc., and I had the whole car repainted for a coupla grand because I was planning to keep it ’til it blew up or burst into flames. Did it less for appearance as much as keeping rust from eating holes through the sheetmetal.
Buncha crooks, though, promised to sand it down to the bare metal, reprime, repaint, etc., but they didn’t even take off the stick-on molding when repainting it! Took apart the mount for my ceebee antenna (had everything pulled and intact: screws/washers/nuts through the holes and assembled), and some idiot who had NO reason to, unscrewed everything and lost half the hardware. And ran down my battery blasting the stereo (should’ve taken the faceplace with me, but I’m an idiot and didn’t) and I found it parked streetside, unlocked and windows open, engine running, evidently to recharge the battery. Hope they all died…
Anyway, comfort/convenience like the audio is one thing, if you want the car “livable”. Dunno how picky you are about audio quality, but even a cheap fm broadcaster could work. Eg, tune to a dead channel, set the broadcaster to that “station”, and play mp3s from it.
One of my old stereos had an aux input up front, so I could play t00nz right from my phone after just plugging it in with a 3’ cable.