I'm not sure that at 200K things will start failing at any high rate. I've run multiple vehicles to 200K or close and not any major issues. The s-10 with the v-6 gas engine I had went to our son and he sold it at 275K miles to a neighbor and it is now near 300K miles. Other than a few water pumps, an alternator, some belts, and normal maintenance it hasn't had any issues.
Yes, at 200K you should plan on some parts needing replacement at some time, I'd consider keeping it if it has been reliable so far. Especially if you are capable of doing some of he work.
