Rarity Of Early British Milled Crowns

I think the price guides relating to English and British coins can provide a reasonable idea of scarcity vs. condition, for the various denominations, monarchs, and condition.

Tony Clayton Coin Values is reasonably good in this regard.
As with U.S. coins English and British milled silver in superior grades can get rather pricey.
He has a reasonably comprehensive price guide on line.

I have a 1662 first type Charles 11 Crown in about VG condition. Didn't cost me much, but that was decades ago.

I hardly ever see George I or George II crowns on sale anywhere in any condition. Crowns of other reigns from Charles II to Anne are quite plentiful, and there are lots of the 1818-20 George III type around. I've been looking for a decent, low-grade George I or George II crown for my collection for years - even one that has been pierced or mounted in the past - and you just never see them. If you do find one for sale, it will be in at least VF condition (British VF) and will have a very big price tag.

I imagine there may have been plenty of crowns in circulation in 1715, and fewer new ones were required - or perhaps they decided to concentrate on lower denominations and not strike so many crowns.

You need to take the prices from auctions that have internet access as the land based auction sites that publish do not all have such operations and drives the final hammer price way below a fair market price IMO. I would go as far as to say those who do not want business from the internet are severely reducing their potential profits. Ask the question why? All in house deals best pals act and many other less than reputable dealings go on and give misleading values to coins.Use as many sources as you can except scambay ignore that place on anything it prints