Due to their availablity, that's a good price.
While I was in Calgary, I bought clown plecos for $10-15. They are more common than many smaller plecos, but if you find one with good striping, they are beautiful. The other plecos I have seen in Calgary are albino bristle nose plecos. Once I found a Queen A pleco for $35/40, which was a GREAT price, but it died the night I bought it
Unuusual plecos--dwarf and full size are hard to come by. When you find them and if you have the money, snatch them up!