As mentioned, Tripacers are great planes in general. As long as you remind yourself of the vintage of aircraft you are contemplating, and the added maintenance which can be associated with rag and tube construction.
Be weary of "deals" on these aircraft (by class, not just Tripacers), if they have been poorly maintained, you could have a big bill to repair. Though well in history now, I do recall a rather intrusive AD on a cluster weld joint on the left cockpit side, quite a bit of work to comply, though should have long ago been done.
As with any older aircraft, wiring can be iffy. poor condition of original wiring, additions over the years, and wires ending no where from old radios removed can combine to be a bit of a mess.
A competent independent pre purchase inspection is well worth your money....