The way I see it at this point, it's either going to to be 5-10 high capacity miners buying up everything from the store, or exchange dumping to whoever will buy spreading the coin thin to the point where very few people actually have the coin required to make a purchase. I.E. at current rate it will take approximately 4 million GPU coin to afford a 290X, if we end up in the 1 satoshi graveyard, forget it. Even if those big players decide to buy the first shipment, the devs will need to dump the coins back in the market to raise funds for the next batch. Once again if there is not demand for the tens-hundreds of millions of coins being recirculated, prices will crash.
Well if they are smart bagholders they will try to keep the price low now, let's say under 20 sat, do microtrades and buy as much as they can while mining it then when the store openes up push the exchange price to a very high value, let's say 200 sat, so they can purchase more items for their coins. Repeat that each time, at least the first few times, then the store could counter it with microtransactions from the coins they got for the items. Just my logical view on what will happen.