What is the highest service ceiling for turboprop airplane like a Cessna 425? What is the highest service ceiling turboprop airplane,  that is fairly small, like maximum of 8 seats, and fairly cheap as well, not going over a million dollars. I looked at Cessna 425, and this plane has a service ceiling of 10km(33000ft), and this plane had the highest service ceiling, that fit the size and cost, that I could find.

So, basically , what plane out there has the greatest service ceiling, that  is small in size, like the Cessna 425, turboprop,  and cheap (under a million) ?
The PA-46-500TP Malibu Meridian can climb to FL300 and you may be able to find a high time one for under a million. 

Socata TBM has a quoted ceiling of 31,000 ft and you may be able to find an older TBM 700 high time airframe for in and around a million. 

In the multi-engine category:

A PA-42 Cheyenne will put you up to just under 36,000 ft and can be had used for under a million.

A Beech King Air C-90 will get you up to 30,000 feet and can be found used on the lower end of the price spectrum.