Spent a few minutes looking for good deals (it's an addiction lol), here's what I found:
Icebreaker/Smartwool - Most of the Ice/Smart gear STP carries is the heavier late fall/winter/early spring variety, size availability is a crapshoot, too. But if they have your size, it's the cheapest way to outfit yourself in top quality merino. At a glance selection of Smartwool seems a bit better.
Example - Icebreaker Men's Skin 200 baselayer L/S top - $26.32 with discount - that's a pretty good price for a great wool baselayer.
Merino Buffs - Icebreaker Neck Chute, $14.92 - possibly a bit short - the Smartwool Neck Gaiter might be better - longer, cheaper - $9.72
Black Diamond - a few good deals on skis, a few climbing oriented packs, winter gloves
UDAP - Bear Spray 7.9oz - $22.72
Birkenstock - Arizona Sandals sizes 36, 37 - $54.92
Camp - Jasper Climbing Harness, XL - $31.17
I'm sure there's lots more worth noting but STP only pays me so much (ie, nothing) to market for them. Good luck!