I don't collect $100 'high denomination' banknotes but I do believe that a dealer's price (esp on a large LOT such as 15 consecutive banknotes) is not an unreasonable place to start. I didn't write that it was necessarily "fair" - only, perhaps, that it was "John100" opinion of a fair price. The goal of my reply was simply to give the owner of the 15 notes a different perspective since they asked. I wish I could be more supportive (positive even) but the real litmus test is to put them on auction starting for $10 & see what happens. Why start them at BV if everyone wants them?
I'm also with "John100" when it comes to insert replacements because I hardly know any collectors interested in modern inserts. Obviously, there must be a market for them but I do believe that this market is far softer than Charlton's suggested BV's. I actually bought 2 tough 2001 PMG
UNC66 EPQ inserts for 50% BV about 2 years ago & I can assure you that both are far more uncommon than the OP's note (b/c they're also change-overs).
If you had two consecutive 1923 DoC $1 bills in MS65 of a more common type you wouldn't think that might be more desirable than each singly? ..What about 1935 $25 in AU or better. Worth more singly or together as consecutives? 1878 $1 St Johns in EF or better consecutive?
Each hypothetical example you provided is based on super desirable banknotes! Older DOC
& BOC's 1935 short-lived debut series cannot be compared to post-1954 series. May as well compare apples to oranges. In these special cases YES indeed: we will find the "big boys" who frequent Heritage
, laying down serious bucks for some of the examples in consecutive if they're TPG
(Original/EPQ) & presented with excellent eye appeal (esp in a hot, healthy market). Anything can happen in a real auction scenario (& in the scenarios you presented bidding wars may be possible).
However, try that same hypothetic auction for 1973 or newer & we're speculating on a whole different "ball game." Even, if the listing was for a rare/scarce *(asterisk) replacement (*AA above 5M: *AB; *FB; *FH or *MD, for example) I doubt that the final bid would be more than what one of these has achieved in recent auctions. I believe that what would be paid for (the run of 15
) would likely be far less than 1 single auction result (since collectors would suddenly question the data/# compiled by Charlton). This is my opinion- but I'm sure you'd see the price of each scarce prefix decrease just as it did for the 1954 *N/Y $1.00 (& several other Modified replacements) after runs were auctioned off. Once runs of asterisk replacements are found the market typically cools (corrects) for the same note.
While indeed, we're seeing pretty odd stuff in today's market (esp with COVID19 sucking the life out of the economy) I doubt you'll see anyone speculate on 17 year old $100 inserts (& want to buy 3 let alone 15).