Well, maybe a couple of notable ones...
Buy.com
A shrewd Deal Hunter can make out VERY well with these guys. 4.6 at RR, but I've personally never had an issue with shipping. Bide you time till they offer the free shipping days, in combo with the coupons and you've got a GREAT deal possibility.
Onvia
They offer free shipping on most products. Again, bide your time for a coupon and great deals to be had here.
Staples
Coupons out the WAZOO! Free shipping on orders $50 and over.