82 xr200 good deal? help!

hey guys! new around here! 18 6'4" 170lbs.
might be looking at a 1982 xr200 bike. just something to start out with and beat on. I have a little bike exp.and I'm a hardcore snowmobiler. I ride a 2001 Mxz 800 (2 stroke :) mmmm) so i'm pretty good with power and toys but I need something to keep busy in the offseason.

bike needs a kick start and a front brake cable. I am very mechanically inclined and the guy wants 300 canadian firm. good deal? stuff to look out for? any buying tips or other recomendations?! wouldn't mind a 2 stroke but a 4 will do.

what should i look for when inspecting a bike? I've heard sprokets and chain are a big thing. also what is alot of miles for this bike (engine) ? how often should the oil filter be changed? any thigns too look out for on this model? any idea on the power of this bike or the specs?

thanks in advance everyone!

oh yeah and for the record i basically learned to ride dirt bike at my aunt and uncles house riding thier (85-86?) suzuki 185 2 stroke and i was pretty good on that thing.......

I don't know if that changes anythign but though i'd add it

finally got ahold of the guy. The bike is in parts, kick start is binding........I don't feel like doing a whole engine rebuil.....nor do i have the time