The 03 249 gasser is brilliant.
As Perce has said, use first gear for most of the sections and you should do well. The 249 will go almost anywhere in first.
To get that grip and softness but still have the "quick power" when needed try using a modified quick action throttle. File the first 12mm or so from the throttle barrel down to the level of a slow action. You can file as much as you want to suit your riding style. This way you get the best of both worlds, a slow action throttle at 0 to 1/4 opening with fast action comming in a little later.
No reason for the gasser to look any more second hand than any other make.
Rode a beta 200 lately and hated it. Stay with the gasser.