Very nice, They go for $300 plus around here also. That is if you can find one that hasn't been "sporterized". I hope to find one for myself someday. Too bad .303 is getting $$$$. Heck, for what you saved you can buy ammo and still be ahead of the game.
As to your barrel issue, try some special copper remover like Hoppes. The Enfield I had several years ago had a decent bore, then I cleaned out the barrel using the Hoppes copper solvent. It took several days to get all the green out, and the bore looked much better.