The 702P will even do 280kts+ at FL280, balls to the wall. But it will burn +50gph doing so with its 350hp engines. The 601P is not quite as fast with the 290hp engines (about 235-240kts full throttle), but it's also cheaper than the 700's. They're basically the same airframe. 601P will burn 25gph doing 200kts, which is very good economy. Not cheap enough? How about 20gph for a speed of 184kts?
But if you need turboprop speed with piston economy and don't mind the FF, there's pretty much only one ride in town: 700 or 702P.
Many Aerostars go through Aerostar-experts, so don't show up on Controller. If you're in the market for one it's always a good idea to check in with Don at Aerostar World:
http://www.aerostarworld.com/index.php/aircraft-sales