$2000!! 🤣🤣 Sorry but that is just ridiculous!
This card doesn't come up too often so it is hard to gauge a price as there isn't much in the way of completed sales.
This card had similar release to the dual basketball signatures which are also to difficult to come across.
I believe the dual basketball signatures are worth around $250-$350, (which I have bought in the past) and I would put the Johnston Signature at around a similar price.
As well as soccer collectors you may get Liverpool fans interested in this card which could increase the price in some way.
Maybe an auction would indicate a fair price?