Granted, they have listed two masks and one piece of set decoration which seem to be production-made pieces, so possibly not every item is a replica.
Do you think it's shady of VIP to put these masks into their auction when collectors have made them aware of the fact that they are replicas? VIP is, of course, only deals in production made props, costumes, and set decoration.
Stargate masks from Distortions Unlimited are super rare, and certainly have value, but with VIP as the seller I think the prices these masks realize will be much higher than they would otherwise get. They just don't have the value of production made assets (not to mention the awful condition they are in).