I doubt it'd be anything like 20-25k, these barely sell for half that in general as there are too many LEs, and too many gold models with initially high MSRPs around without buyers. At open auction I'd see it going for $6k-12k depending on how many interested bidders there were. There's really not that much gold content here either especially as there's no bracelet.
This is the one Gene Cernan has though from memory.
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