I have a group of US Modern sheets for sale on eBay ending this evening. I started all of them at 99 cents. $2.5 flat shipping for the first and 10 cents additional if you buy more than 1. There are approximately 10 listed. Nothing scarce here but at current bids(10 % of face) they should be interesting to some members here.
Here are the links(I might have missed a couple... check my store)