Yugster offers this Pop-Up Outdoor Sun Shelter in Pink, Orange, or Green for $21.97. Coupon code "FreeYugBuck" cuts it to $20.97. (Super-yes via eBay has it for a few cents less with free shipping.) With $5 for shipping, that's tied with our September mention and the lowest total price we could find $by $15 elsewhere, outside of the mention below. It folds down for easy storage and purportedly provides 50-UPF sun protection.
A close price: Amazon has it for $22.96 with free shipping for Prime members.