I agree that long-term they won't have a huge increase, but short-term the first ones to auction will do strong numbers because you have people trying to fill new holes in collections. McPhee cards went for more right after he got elected than they do now, so even he leveled out. There are plenty of HOF'ers in the set more common than O'Day so I think the first few cards will be 3-4x the price, then they will level out to regular HOF prices for the set.
White cards already did go for more and from someone trying to get one for years to complete my Pirates set, he is very hard to find. If I could give anyone financial advice, if you're not married to the idea of owning a Deacon White card, put it up for auction before someone else does and watch the price. I can guarantee that while I'll bid a lot, it won't be me winning it at the price it will end at.
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