HSN.com has a code for $10 off any one item and Deborah Lippmann is currently free shipping. I bought multiple Deborah Lippmann polishes for $6 each and a few Stripper To Go Removers for $2 each (all bought separately) with free shipping. To use the code multiple times, check out as a guest. You will have to buy one item at a time though. Go through Ebates or other discount website and get cash back. I go through Discover Card and get 10% cash back on HSN.
There is currently free shipping on Benefit, Trish McEvoy, Lancome and Shiseido too that you can use the $10 off code. Code good through 12/31/2012, but not sure how long there will be free shipping on the above brands.