Okay, my two cents worth...
Yes, any Healey is desireable, some models just push you over the edge and cause you to "write the check".
Sometimes the reason is because there was a Healey influence in your youth (next door neighbor, uncle, brother or whatever). It would be natural to want whatever model captivated you at that time.
In my own case, it was the Healey general article that Road & Track published sometime in the early 70's. While I knew what Healeys were and had seen them around plenty of times, I was never aware that there was a two seat six cylinder car.
I spent many years on an MGB kick (having owned about sixteen of them) and always considered the Healey too costly to buy and maintain (my cars had to do daily duty as well).
Lo and behold, around Christmas time of 1977, a shop that I was doing a few side electrical jobs for pushes out BN6L 942 for its Christmas party. Austin-Healey West had done a pretty decent body-on restoration of this car and it was right next to the parts counter/liquor bar. While I sat there
I don't think that I ever stopped taking in the details of that car...
Silver body with black racing stripe, Motolita wheel, 3" lap belts, side outlet exhaust, no bumpers, in fact most of the trim items hadn't been put back on since it was painted. It looked like it was ready for competition as it sat there.
The proprietor, the late Ray Caivano could see that the hook was set...
me: Oh but Ray, I can't afford a car like that ($4200.)
Ray: I'll finance it for you (actually his wife did). Why don't you take it out for awhile and see what you think?
In April 1978 (with tax refund in hand) I agreed to purchase BN6L 942.
While this has no bearing on the value of a BN4, the true value of any car isn't always determined by the marketprice, sometimes you just know that you have to have
that car.