We fly an Aztec.
Sweet plane, I flightplan 160 kts @65% pwr (21MP 2300rpm)
Ours will actually do 185kts TAS if you firewall it and give it 10 min to accelerate.

It gained 10kts after the paintjob and another 10 kts with the new engines.
160kts @24 gallons/hr total.
It's nice and light on the flight controls in the air, and a bit of a big baby on one engine. By far the most pleasant SE characteristics of any multi I've flown.
Single engine with 20mp 2300rpm on the working one the speed is still 110-120kts TAS and ours climbs with 500fpm past 8000' .
Meaning you'll overtake and outclimb a 172 or even an Arrow on one engine at 8000'
Not at MTOW, never tried it but weight doesn't really seem to make a difference with this plane.
Wouldn't really trust anything for sale for 75K seems low to me.
A good plane with decent avionics should get about 120K and I've seen totally tricked out ones for 175K.
Are the engines over time or what?
Does it have a damage history, has it been flown recently or sitting on a ramp somewhere?
I looked at an Aztec some time ago with a "new" paintjob, corrosion coming through already and serious corrosion in the tanks, I'm talking quarter inch stalagtites. Tanks need to be put away wet, full fuel, to prevent corrosion.
Once that happens your whole fuel system is FUBAR and needs to be replaced.
Find an old and wise A&P that has a lot of experience with them and that can tell the model years apart. Minor differences and different AD's for them.
Since they're generally 40+ years old there might be some not so legal anymore modifications done years and years ago.
Really pay somebody to do this right.