This is not consistent with your stated goals.
Wouldn't you?
150K or less as your budget allows, maybe 175K.
A well cared for truck will look, drive, smell, sound and feel like a new truck. Lots of rattles squeaks was driven over rough roads. Obvious stains, scratches, tears, dents, dirty, especially in crevices and under seats, door jambs, etc. If the previous owners weren't detailed in keeping it neat and clean they probably weren't detailed in proper maintenance either. If the back tires have noticeably more wear than the front tires... burn outs. The tires should have an even amount of wear across the entire tire tread width, all tires should be worn evenly among the four of them. Under the hood - missing parts, hoses, disconnected things. If you see wire nuts any where... Leaks, odd noises, vibrations, shakes, jerks, bad rust... Does it accelerated properly, brake, steer and ride correctly? Check that all the lights on the dash work (bulb check when you turn the ignition on) and no trouble lights are lit. If the check engine light is on - don't buy it, and don't buy any lame excuses for it either. Same goes for any other trouble lights, brake, TPMS, ABS, etc. Won't start - don't buy it, Won't go into gear or shift right - don't buy it. Key FOB don't. head lights won't come on, AC doesn't work - DON'T BUY IT (Unless you want to deal with the problems that the previous owner chose not to, FOR A REASON).
A well cared for truck should be just as obvious as an abused one.
Regardless of age or mileage it should still function and operate like a new truck. My 2007 with 250k on it did.