Some Daleks wanted to buy an M3W for hurtling around a distant planet they had taken over after the new Dr went completely insane (figuring that parts and servicing were no harder to get there than lots of places on Earth).
But they couldn't get a comfy driving position and the lack of doors meant getting in was very tricky for them. They really liked the bomb release button though.
The S&S engine wouldn't run very well on that planet either due to Oxygen starvation. On the upside the lower gravity meant that the M3W could be homologated as a sub 450 kg trike as some people seem to prefer.
Oh well - just another reason Daleks are not going to rule the Universe while Morgans exist to mess up their plans.
