I seem to recall a past thread discussing stock medallions - If memory serves, the factory would run a special order stock if a dealer or broker would make a large enough buy...
I don't think the medallion is enough to make the gun worth more. I picked up a H&R in .204 with camo lams & a "Limited Edition" medallion 1) because of the caliber, 2) because the stock was gorgeous. The medallion wasn't a factor in my decision.