You can get the entire  e.l.f. line of makeup for $1 each on their website.

You do have to pay shipping, but you can use the code CAROLINA to save 50% off any order less then $15 or $7.50 off any order over $15.
(thanks theCentsiblesawyer)

Gets better… order $20 and get a free subscription to W magazine or you can print out a rebate and get $9.99 back by mail in rebate.

So best deal:
Get 21 items at $1 ea
Use code to save $7.50
Total with Shipping will be $20.45 before tax
Do the MIR to get $9.99 back

Make sure you print the rebate form before completing your check out process it is difficult to find the form after you check out.

You pay $10.46 + tax for 21 items!!

(Thanks Laura for letting me know that some of the original information was wrong.  The makeup off this site is always $1 ea, it is still good for stocking stuffers or for yourself but just so you know it’s not a sell out and then it’s over kind of deal.)