This 4-piece set is available in two color options for King size beds. Use Ebates for 3% cash back and this sheet set ships for only $28.27.
Similar sheets are regularly priced around $80.00 at Amazon. Most reviewers say that bamboo is noticeably softer than cotton.
Pacific Coast 300 Thread Count Bamboo Sheets
Pay $23.99, and $4.99 shipping
Get 3% cash back with Ebates
Final Price: $28.27 shipped