My valuation was for a quick sale in here, on Acorn Auctions or on DomainLore. After all, we're comparing an offer of CURRENT cash (which requires an instant decision) so it only makes sense to compare with the CURRENT value of the domain. And the only way to unlock ANY value right now this instant is to flog it at reseller prices via the sales outlets I mentioned.
Any hypothetical future value based on waiting and waiting and waiting for the right end-user to show up is irrelevant in this case since it's impossible to predict whether you'll be waiting 6 months, 6 years or 6 lifetimes to get that 5-figure "value" back from a sale.
That's the trouble with holding out for end-user prices. The amounts are nice, but the timing is TOTALLY out of your control.