I get that rogdcam. I like studying the economics around these items.
272a having 72 known...Stamps have equilibrium when the buyer and seller align satisfying need and therefore there will be no appreciation on this. This is normal abiding scarcity principle. There are a slew of them on
ebay alone priced for every condition. Only if demand were to ramp up against the waning supply would there be appreciation. But there isn't, because a seller will emerge each time they can get their #, until every 1 of the 72 owners acts and pulls it off market (cutting off supply).
In the case of 1502a, there is an "ask" on hipstamp for $1000. This then sets an upper boundary, albeit negotiable. So between the sub $675 and $1000 is where the stamp price lies (assuming conditional equivalant). The only way for appreciation to occur is, not just for supply to dry up, but also for demand to emerge. I suspect that yesterday's buyer conforms to 1 of a few scenarios: - 1 being a seller lined up for a higher value, or a longer term value proposition based on current supply side excess, where they think they can garner a bump. Clearly the long term holders are underwater, who bought in > $1000, so they're either holdouts for future appreciation or liquidation ready. This person could dollar average down, and accomplish a secondary goal of further limiting supply and reduce their cost basis.
Say I corner the market on a sexy stamp- lets pick 3835a. But I price it out of bounds with no sellers, say $20k. You effectively put the stamp out of reach and your target stamp buyer is gone. With the exception of nyse/cia inverts noone (which are roughly at equilibrium themselves) nothing modern is trading in that range. So people treat it like the Z-Grill, a never going to happen philatelic fantasy and move on. So scarcity isn't trivially about cornering and rocket pricing.
Now when you move into the upper echelon of the best of the best stamps, a new market occurs with unique actors. These are not people plopping stamps into albums to joyfully look at with their grandkids. These are investments with motivations from tax perks, diversification, speculation or study. If you can push transition a stamp into this sphere, is where you get a payoff. I tend to think it becomes the PB of the 1502a, and everything else is relegated to common + the rarity vig say $600.
I'd be interested to know which stamps have appreciated in the last 100 years of issues outside of the classic era. Not from face value to Scott, but from first SCV to present SCV, for stamps say over $100 and then factor in inflation.