It may just be a generational thing (I'm 45 and way older than most on this board)--or it may also be a regional thing (I've been living away from Milwaukee for the past 10 years, mostly in the East)--but I don't see the bobblehead phenomenon as being universal. I've attended memorabilia shows in NY, Philly, NJ and Florida, and haven't really seen any major traffic in and around modern bobbleheads. I've stood in line for autographs at the Philly show, the MAB shows, the White Plains shows and others, and I've never seen someone with a bobblehead, waiting to be signed. I subscribe to SCD, and don't see much there in advertising or editorial content focused on bobbleheads. I was a regular listener to WFAN in NY, and there was hardly a word ever mentioned on Yankee or Met bobbles. I regularly follow memorabilia auctions, and while they often focus on vintage material, there is often new stuff sold (signed balls, game used jerseys, bats, etc.). I did go to a game in Baltimore this past year and they were lined up early to grab a commerative Cal Ripken, so there is interest in some places. Maybe it's just that all the bobblehead traffic is on eBay or local card shops--or in places I'm unaware of. I'll buy that as a possibility. Now, to my point. . .there are way too many variables to say that this item is DEFINITELY going up in value. What if Prince's performance wanes? What if he is injured? What if the economy tanks and discretionary spending pulls back? What if he leaves via free agency or trade to a market that doesn't embrace bobbleheads? There are only two possible choices, to sell or to hold. . .If you're worried that this $400 item will drop to $250 or $75 or $20, then you should sell. If you're fine with keeping it regardless of its price, then you should keep it.