I do not have a clue, sorry!
I seen a few pairs of them on ebay but I wouldnt chance it
just incase they were fake! The real price of them start
from £190 - £400 depending on what ones yoo buy!
If yoo really want to buy the ones from ebay, check the
persons history of things they have sold and if they have
a positive history, thats all I can think of.. hope it helps
yoo out a little! x