I have what appears to be a new folding 700x25c Pasela tire and two used 700x23c Pasela PT non-folding tires. I think the non-folders have around 475 miles on them but obviously the rear is center-worn.
So, I figure $15 for the new folder plus $13 shipping in the U.S. which makes $28 for all three tires. If I can ship cheaper, I will. If more, I'll eat the difference.