... Are made to order or created rarities as valuable as or as respected as accidental or unintentional ones? ...
One hesitates to look at the prices being paid for The Jenny Contrivance, and think that the valuation would be even higher if only the error were unintentional.
OTOH, a genuine error would enlarge the bidder pool so, to a first approximation, I suppose the answer must be 'yes, intention positively impacts valuation' of an EFO.
As many of us remember, once upon a time, the US Bureau of Engraving & Printing would routinely honor (read: ingratiate itself with) a prominent American stamp collector by bestowing favors from its shop, including essays & proofs that were a) government not-to-be-gifted property, and b) not otherwise available to the public.
Q/ Has anyone here refused to purchase an essay or proof because of its FDR provenance?
The majority opinion seems to be that we are glad that a stamp collector was in a position to pry this stuff loose from the BEP, period, so let the feeding frenzy begin.
If respect is delayed, an as-yet-unrealized capital gain awaits every early buyer.
Collectors focus on their collectibles, eh?