I wish I could provide more proof, but all I can see are sellers asking really high prices and buyers offer really low ones, so most of the trades I've come along are unsold, the only one I've link is because the seller actually has an understandable price tag, and still it doesnt sell as fast as you could think, the whole Halloween restricted + the bonus set effect (aka the fairy voice lines) not being activated has killed the demand for this set

thanks a lot Fluffy, I just saw sooo many unsold ones page after page and most looking for a key or 2 that it gave me headacke :P