It doesn't matter if it costs as much as the cost of the car to have it fixed, it only matters if it costs more or less than it would cost you to replace it.
If it would cost more (including taxes and registration) to buy a new one, than you should get it fixed, even if it feels wrong to spend the car's "value" on repairs. Convince the shop that does the estimate that you only need it functional, not to "look" perfect and new, and the repair bill may drop a lot.
On the other hand, if you can buy a cheaper car that still meets your needs, this may be a perfect opportunity to downgrade.
If you do replace, you can probably get a free quote from a couple local wrecking yards so you know what you can get for it if you just sell the whole thing all at once. That can help you decide if its worth the effort to part it out.
Good luck whatever you decide