AgI have a ms250 and just finished rebuilding an 025, it's predecessor. Both are 2 pull start saws, both perform very well. As far as spares go, you can build an entire saw from scratch without using factory parts. I prefer the old style air filter of the 025, but the fuel/oil caps of the ms250.
Probably one of the last saws in my collection I would sell, pretty nice to use for medium size firewood tasks. You can find a good used sample around here (MB) for around $300.