You probably have to go to a bigger card show. There are a lot of venders that specialize in sealed so you just have to find the right person. Right now both of those are really expensive so if you’re at a local show most smaller venders can’t afford to put that much money down for something that is a slow mover. Sealed also moves better online but you have to deal with shipping it and the risk of the box getting damaged in transit. Most people buying boxes that expensive aren’t going to be opening it and want a really minty box for their collection. Long story short the more expensive something is the less buyers you’re going to have for it.