Help me stick a value on this Elway card? (Newer)

I have someone inquiring and I really have nothing to base this off of (even a book price)
1999 Century Legends Century Collection John Elway
The only other one I can find is on ebay for $61.50, and I can't really find it in the book other than that it shows 10x to 25x hi col- but I can't find the other one in the first place.
1999 Century Legends Century Collection John Elway
The only other one I can find is on ebay for $61.50, and I can't really find it in the book other than that it shows 10x to 25x hi col- but I can't find the other one in the first place.

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Comments
Beckett's online price guide says Elway has 3 cards in the set. Numbers 16 and 53 each have a $50 "book value" and number 162 has a $40 "book value."
I would imagine it is prices around what a Steve Young /100 from that era would be, and that seems to very so much lately. (Three big Young collectors dropped out in the last six months....and amazingly had bids on almost all their stuff, but prices were really across the board.)
If I got $20 out of that card selling it, I would be very happy, $10 is likely more realistic/fair.
Raw: Tony Gonzalez (low #'d cards, and especially 1/1's) and Steve Young.
I think $10 is probably a reasonable guess.
Only an idiot would have a message board signature.