Why Saab?
There aren't all that many SAAB 340's in use or lying around - they just didn't build many. And the ones that are flown have a poor reputation for reliability.
If you feel you must buy a TR I wouldn't think you'd go wrong with an ATR rating. Plenty around, still in production and still being bought. Also the rating covers 42 and 72. A Saab 340 is nothing like a 2000. And before you ask that is a bit of a white elephant. Awesome airplane but again poor reliability. And they built even fewer of them - 80 springs to mind but could be wrong. If you are Swiss then could be for you - I think they have most.
Cheers
SK