I'd be interested in $100 but what's the guarantee? A few months ago I had had a couple get zero'd after I used about 1/2 of the value, Not sure if it was Whole Foods or the 2 sellers were double-dipping and someone else used it up (like what constantly happens with Panera cards due to the way the cards are "discovered"). More likely double-dipping because the cards weren't shut down just the balance went to zero.
I will guarantee 1 day....you got to use it. If you get it for 30℅, it's not gonna last forever.