Goggles and boots definately - see if you can take a rep / ski instructor / landlord with you to get a better rate than the tourist rate.
Jackets- buy the local brand, excellend quality. If you buy NorthFace / Spyder etc and the prices are too good to be true... then they generally are! Beware of some of the copies.
One of the best jackets I ever bought was from Aldi. Really good quality and only about £30.