Do Upper Deck Promo cards have any value?

I remember I wrote away to Upper Deck for these in the 1991 time frame. They're promo cards. The Montana is #1 and Sanders is #500 and Jordan is #1 and Robinson is #500. Do they have any value? Are they included in Master set registries? I always kind of liked them, so unless someone has a burning need for them I didn't plan on getting rid of them, I'm just curious if they have any value. Thanks!

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The value depends on how many are graded and how many eager set registry guys fighting over them..lol
1994 Pro Line Live
TheDallasCowboyBackfieldProject
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Not sure about the others, but the Jordan promo is already part of the Master registry set.