It is a MONOSPEED only no performance tourer....
Climb 90Kt
Cruise 90 Kt
Descent 90 Kt
Rubbish.
The TB range are perfectly good planes. They have a much nicer and more comfy cockpit than the usual spamcans.
Much easier to get into than any single door plane. No handling vices - they fly just as a well designed plane should.
The TB9 is often described as underpowered, but this is relative. The TB10 (180HP) is better; I've flown in one a few times and it is fine for ~ 700m hard runways at max weight.
Maintenance and parts availability wise there are no particular issues with Socata. If you buy a 25 year old one then you will have all the usual unscheduled maintenance issues applying to any 25 year old airframe.
I fly a TB20.
There is a user group at
www.socata.org - best to ask any specific questions there.