A.S.
I checked the Craigslist in Austin for Obermeyer and there are quite a few things for sale. Like the size 7 ski suit for $35.
Obermeyer, spider, north face, marmot, lands end, some columbia, burton, etc all make terrific cold weather gear. You're right, it can get expensive to buy the clothes. To outfit my 2 kids in bibs/jackets/fleece sweaters was $288. I splurged and bought brand new...Obermeyer has the iGrow and should last two seasons fingers crossed.
Check consignment stores too. GL! Happy skiing!