You're not reading what I wrote - maybe this is clearer: It glosses over the fact that for a set to appreciate from MSRP like 41999 has (regardless of what the sales chart shows), there must be demand for it. My point is valid whether we're talking about the value of this set three weeks ago or the sold prices you're seeing right now. This set would not sell for 50-100% over MSRP if people didn't think it was a great set or if there wasn't substantial demand for it. Why is that so controversial?
As far as this comment goes: I take issue with the idea that this set has appreciated since its retirement, or even its release. Well, the price has appreciated since it's release. Anyone could purchase this set for MSRP at Lego S@H on September 1. Now, anyone can buy it for MSRP + a significant premium on secondary markets. In the US, these prices were $200 for MSRP and are $300-$400 for current secondary sales. That's a healthy premium. Again, there's no controversy or question here - the facts are clear.
And what does "there's far more supply than demand" even mean? The supply isn't changing - if anything, it's shrinking and always will. Tell me how many listings or sales there were a month ago for this set compared to the number of listings or sales today. This may be a surprise, but there are fewer today. That doesn't point to any market flooding. And for every set that is sold (presumably since Mark bowed out, they are all to end users given the high price point), there is one less set that current and future listings have to contend with.
While this may seem like it's in direct conflict from earlier posts, I would be willing to wager the set has decreased in demand since it's height 6-8 weeks ago. In fact, most Lego sets on the retail market go through this phenomenon after release. The difference here is that the demand is still strong enough to support a $350 purchase price (again, 50-100% over MSRP) in the US. That's what I meant when I say demand is high for this set. Again, what is so controversial about this?
If you think the price will continue to decrease until it hits $300, ask yourself if you would be willing to sell one of these for $300 today. My guess is that you would hang on to it because you know the supply will continue to dwindle while the demand levels or potentially grows.