Use the Hopkins Nordic Swap to look for used equipment offered or to enter information about equipment you are selling.
Skinny Ski provides info on local ski swaps http://www.skinnyski.com/gear/sales.asp
Play It Again Sports has boots and poles--look before the season starts for the best selection. They also have skis, but if you are buying skis, a ski shop is best for getting the best fit and quality.
Photo credit: Tracy Lowmanstone
Nordic Ski Shops
All of these shops have team price discounts for high school skiers of 20-30% off. Ask for this when you buy items.