I have another English cello, made around 1800 or very early in the 19th Century, (so, I suppose, Kennedy school) of a completely standard size and in good condition. For some unknown reason it sounds wonderful. This one's £17,000.
Yet another English cello, circa 1835, by Thomas Kennedy is now available at £30,000. Why so cheap? It has a tiny repaired soundpost crack in the back. But that doesn't affect the sound.
I have a German cello made in Mittenwald in 1845 at £8,000, and another antique German cello at £7,000.