I think as Crewella said, any crafts, regardless of what the material that they are made of is worth the price. just adjust perhaps for the material, but people are not paying just for the actual material, but for the craftsmenship that goes into any project. Surely you can sell these in your shop and there are a lot of people that would love to own a pair or two for their Pleos, After all, Pleos like to play as much as dogs and cats do, and we all wish we could fly!
RWM