The 35 centers will continue to go up in value, I think.As more people come to realize these exist, I think we will continue to see some very high prices as they trickle out into the market.
Demand will continue to be strong, and I doubt very much we will see a large influx of new finds, but there will be more. Just not enough to offset the rarity. Yep....they will continue to be unaffordable for many of us.