In Canada, I can find single sheets, cotton or flannel for less than $10 for a King sized sheet. I can get them at Giant Tiger (a small town department store) Sears, Winner's (name brand, discount, clear outs) Wal-mart (have to be careful that they aren't loose weave)and Len's Mills (discount, clear-outs). I can't get what I want every time but will stock up when I find what I want.Recently the whole bin at Giant Tiger was on for $5 any size. I bought twenty. I like darker colours or patterned sheets and never buy white as it just doesn't suit the quilts I make. I also buy for my guild and we get a lot of requests for guy quilts which seem to need blue, black, green or maroon backs.