The decision of whether or not to keep–and repair–the car should be based on an actual assessment of its overall condition, not on assumptions that might or might not be correct.
So…“It doesn’t have a rust issue that I know of” should be confirmed by putting the car up on a lift and doing a thorough examination of the undercarriage.
Also…Does this car have a manual transmission or an automatic transmission?
If it has an automatic trans…What can you tell us about the maintenance that it has received?
When automatic transmissions have their fluid (& filter) changed every 30k miles, they can last for…perhaps…300k miles. When that type of maintenance is not done, they usually fail somewhere between 90k & 120k miles, or perhaps a bit later. If you haven’t maintained the trans properly, this is essentially a time bomb that is going to explode in your wallet very shortly, thus adding at least a couple thousand $$ to upcoming repair bills.
How about the timing belt?
It should have been replaced by 105k miles.
If not, then you have to budget several hundred $$ for replacement of the timing belt, water pump, serpentine belt, and all belt tensioners.
So, the decision about whether to keep & repair this car or to cut your losses really rests to a very great extent on how you have maintained the car. Repairs to a door handle and a wiper motor shouldn’t be very expensive, but if you add that to the cost of replacing head gaskets (there are TWO), and the cost of a trans overhaul plus a timing belt/water pump/belt tensioner replacement, then the total cost is probably more than the vehicle’s book value.
What can you tell us about this car’s maintenance history?