I would keep it. Unless you're doing your own work, a 180k mi used car is going to cost you a fair amount when you need a water pump, timing belt/chain, accessory pullies, suspension components, rubber dries out - so CV axle boots, tie rod boots, ball joint boots, suspension bushings, wheel bearings, brakes, fuel pump, random sensors, etc. Most of those, you currently don't have to worry about for a long time.
Now if you do your own mechanical work, then I could go either way. :)
I recently sold two vehicles (one with 213k and one with 283k) to get one with 103k. I do my own work, but I was tired of 200k+ mi vehicles and the amount of work involved to keep them in pristine condition (annoying oil leaks, etc). It was worth it for me to have something a bit newer, and I would be extremely hesitant to go back to something that needed more attention. If you DIY it's generally cheaper to run something older with high mileage, but removing the stress overhead of always having to fix something was worth it for me.