But you are making the case that, without ROFR, the same buyers would only be willing to pay $84 per point, even though they'd pony up $110 per point if ROFR puts that purchase at risk. That doesn't make any logical sense. If all economic conditions are equal except for ROFR, a buyer is either willing to pay $110 or not. If the sellers hold the line and ask for $110, that's how it's going to be.
I agree with you that a buyer who is willing to pay $84 will not all of a sudden be willing to pay $110 just because new buyers (ROFR) entered the market. What you're willing to pay is what you're willing to pay, it doesn't change.
I want to explain to the broad audience how a demand curve in economics works. First point: economically speaking the person in your example who is only willing to pay $84 that is their maximum, they aren't going to increase that amount because they can't get a contract. If they were willing to increase their amount then $84 is not really what they're "willing" to pay. Everyone talks about "supply and demand" but it's really demand that most economists worry about. The market will provide the supply at certain points along the demand curve, so there isn't really such a thing as a supply curve. For example, if there are only 2 DVC resales available and there are ten buyers bidding against each other and end up paying $500 per point then those contracts will sell for $500 per point and a lot of you will rush to sell your DVC to try to get $500 because you're getting such a "deal". That rush of sellers will increase supply and there won't be enough demand at $500 so your contracts will just sit there and not actually sell. You'll have to lower your price until you find where the demand is at the price you are willing to sell at.
Imagine a chart with a line going from the upper left to the lower right. The Y axis is price per point. The X axis is number of buyers. The line shows how many buyers are willing to buy points at a certain price. At $2000 per point there are 5 willing buyers but at $20 per point there are 5 million willing buyers.
What happens in reality is there is a supply of DVC contract on the market right now. The seller has made an offer to sell at a certain price point. You can look at the demand curve and know for certain how many of those contracts will sell at that price point. ROFR is part of the demand.
Let's use your example of $110 per point. At that price point there are X buyers willing to buy. DVC is part of those X buyers. If there aren't enough contracts available at $110 to meet the demand then all the contracts will sell out. If there is an over supply at $110 then contracts will be sitting for months on end without selling. DVC has a maximum number of points they can purchase at various price points (again, we're talking "maximum" any buyer can buy at a price point, Disney selling it's rights to Star Wars to buy more DVC contracts is included in this demand curve).
In 2013 I bought a VWL for $55 for 200 points. And there were lots of SSR sitting there for $60 per point. That's because there were many willing sellers but not enough buyers, so all the buyers at the $150, $120, and $90 price points had already purchased points. But there were still many sellers looking to unload their contracts and they were willing to go cheaper, so they dropped their price until the suppliers were willing to meet the demand at those lower price points. DVC had already maxed out it's ROFR at the $60 price point so they were unwilling to buy more points at that level. They probably would've exercised at $40, because DVC has a number of contracts they're willing to buy at every price point along the demand curve. The "DVC Floor" that keeps prices at a "normal" level only works if there is a "normal" supply level. If there is an economic shock and people run to sell their contracts at any price and there is a massive oversupply the DVC floor will keep dropping and dropping. DVC will have bought all they can along the demand curve and there will still be contracts sitting there.
A buyer who's willing to pay $84 will only purchase a contract once prices fall that far, meaning that the point when the oversupply has left so many contracts that there are sellers willing to sell at $84.
To use me as an example I am willing to purchase a non-2042 contract for any on-property DVC at $110 (weird that it matches your example, but that is my limit) per point. So I'm not buying. I'm not saying "well I'll only pay $110 but they're going for $140 so I guess I'll pay $140". No. I'm just sitting out until there are willing sellers at the $110 price point. that won't happen until there is much more supply on the market that the demand at the $150, $140, $130 etc price points has been satisfied and there are sellers willing to sell at a lower price point.
Could prices drop back to 2013 lows of $60 per point for SSR or $90 for BCV? Sure. You'd just have to have a situation where so many current DVC owners decided they were willing to sell at those low price points that all the higher price points had their demand met and there were still DVC owners willing to sell and willing to lower their prices until they could sell their contract. For example: 40% of the working population becomes unemployed over a 6 month period. You could imagine LOTS of DVC owners willing to sell at almost any price to keep a roof over their head.
Possible? Yes. Unlikely? Of course. But the 2008 crash was extremely unlikely (black swan). It doesn't mean something like that can't happen again.