The Jodel 1050 is very nice handling aeroplane with a decent compromise between field performance and touring capability.
Mine has taken me to Berlin half a dozen times (and, yes, we did stop...).
Things to look for:
- check around the stern-post/tailwheel attachment, this area of the fuselage can suffer if moisture has been allowed to get in.
- brakes, if of the original drum type, can be a source of problems
- fabric and timber, as per any aircraft with this type of construction. Get some access panels off and poke your nose in, does it smell musty or less than 'sweet'? This might indicate rot or deterioration.
There is no airframe 'life' limit, just what condition its in.
O-200 formal TBO is 2000hrs but, as said by Flyin Dutch, can be run 'on condition' on a Permit to Fly. Check compressions and oil pressure. Ours has done about 2600 hrs (1000 hrs since top /haul) and the normal running pressure is 43psi, about 25psi at hot idle.
The rest of it involves using your common sense looking at the condition of things like seats/trim, instrument panel, cockpit glazing, cowlings, tyres, propeller/spinner.
Good luck with whatever you end up with.