I have to disagree... I've gotten some great deals from the sites you mentioned. But you have to be diligent about watching them. I got a pair of Oakley pants last year that are the titties. I think they retail for $200+, and I'm sure I didn't drop more than $90 for 'em.
I just bought a pair of Burton gloves from SierraSnowboard.com for around $30 that are badass too. They are/were having a big 70% of sale a few weeks ago... not sure how much is left, but it's worth checking out.
http://www.sierrasnowboard.com/sales
Of course there's always the SAC/WM company - Backcountry.com - which has an "Outlet" section on the website with moderate discounts. These are the items you'll see pop up on SAC and WM, just not quite as cheap. FWIW, they've got a great return policy... if it doesn't fit, or you don't like it, they'll take it right back.
As for goggles - that's not something I'll buy online. I just sucked it up and bought a pair of Anon at EMS last year, and I couldn't be happier with them. I want to say they were around $90, and worth every penny.