I purchased a voucher for early access to the Kleinfeld sample sale on May 7 through Gilt City, but I ended up purchasing a dress alerady. The voucher cost me $150 and it comes with early access to the sale (12:30pm instead of 3pm), an additional 30% off dresses, $50 to use on accessories, and more.
I spoke with Gilt City and they said the voucher is transferable. Once it is transfered to someone else, it will be considered a "gift" and they will change to name on the voucher.