As
@Rev said, the general method you are using is the same as the methods used by Benard Bills and John Carney. I'd have to pull the books to see how close the handling is. Kudos to you for coming up with that handling and performing it well
To answer your original question, I don't think anybody would pay for this. The method is not new, the effect isn't substantially different than other sandwich effects out there and it is a lot of work to do a control then the two moves necessary to get the card into position for the sandwich. There are a lot better sandwich effects including Aaron Fisher's Simple Sandwich / Search and Destroy, Eric Jones Ishkabibble Sandwich and John Bannon's Watching the Detectives.
As for your handling, be wary about playing with the cards too much - it give the impression of "skill" over magic. For example, at :30 in the video you make an unnecesary rotation of the deck. Every time you do "something" with the deck, the spectators see "something" and think that the "something" is how you do the effect. Remember, if a spectator think they understand any part of the method, they think they understand the whole thing.