Hi there!
I just purchased a Speedy 30 at LV's flagship store at Champ-Elysees. The price was 415 EUR. In US dollars-$576.39. The detax in EURO is 49.80. --This is your refund and it depends on form of payment. If you pay in cash, you'll be refunded in cash at the DETAX window. If paying by CC, it will be credited to your account within 4-5 wks. The SA will fill out the detax form for you and your Passport and other personal info. will be needed. You will need to take the forms (1 original, 1 copy) and get them both stamped at the DETAX window in the airport. There is a sign at the window that says "No goods, No refunds." I had mine with me at the time,but the guy didn't ask for it. So, just in case, have yours ready in hand. When he stamps it, take the copy and only mail the original. Look for the yellow box (that's the mail box),should be few steps from the DETAX window, drop it and your set. Make sure you do this before you go to security. HTH.