There's a 78 J on Controller that meets most of those reqs for $95k and a couple others at ~115k.. I would add a decent Autopilot to your list of things to consider and ADSB just to avoid the headache. Well under 100K??--if you find what you believe is a fantastic deal on a 70s model J with your reqs, I would venture to say there are some reasons why the deal is sweet. You can find a really nicely equipped C/E/F for under a 100k but the nicer the equipment and lower time the engine, the shinier the paint, and the cooler the seats...even those will creep up nearing "well under 100k".
I set minimums for what i wanted...had to be an F or J--family trips and the little extra room would be nice--Engine time under 750-800 ideal / avionics IFR certified because I'm flying family and weather doesn't wait for vacation days to align (430w / adsb out / autopilot 2axis) / decent interior and paint(to me these are almost fixed cost, ie, I want new seats and things 10AMU, avionics and engines are always a variable in my head and my wallet....new GTN750 sells for 15ish but installation well it could be, it may be, it should be...how long will i be without a plane(being youre going to want it for training)..1 month-8 weeks--?? This is why I believe folks will say find one with what you want in it...saves you the headache, downtime, and unforeseen costs.
I then priced out different configurations and decided on what i would and wouldn't budge on. Then wait to find the plane that matches your needs and wants. Hint--probably wont find it on normal sites but would definitely suggest emailing @jgarrison to get on his incoming list and network like crazy because someone somewhere has a gem sitting in a hangar they just haven't come to terms with selling yet...but they will and you want that deal.