Walmart offers the Pentel Arts Oil Pastel 50-Color Set for $5.71 $6.19. Choose in-store pickup to dodge the $5.99 shipping fee. (Amazon charges the same with orders of $25 or more and free shipping for Prime members.) That's tied with our mention from a month ago and the best price we could find now by $4. These acid-free oil pastels blend easily and are ideal for use on paper, board, or canvas.