Bed Bath and Beyond has a great silk sheet set. They're on sale right now too!!! And don't forget to use a 20% off discount. Great Deal!!!
http://www.bedbathandbeyond.com/Product.asp?SKU=121554
you realize that it's only 15% silk...
Many times you can tell if something is real silk by 1st the price. Most 'silk' marketed is actually polyester or some kind of poly/cotton/silk blend ( (just read the label).
I sleep with a silk scarf and have silk pillowcases that I purchase here:
http://www.tenderheaded.com/silpil1.html - this company also sells satin.