You know the Royal Doulton with hand-painted periwinkles?
From Keeping Up Appearances, the Britcom
Googling, Hyacinth’s china set was Colclough Braganza (not sure if that’s the name of the pattern, or a brand name - apparently it was made by Royal Doulton, anyway).
Googling THAT gives a bunch of pieces that look like Hyacinth’s set with prices ranging from 6-40 pounds (~C$10-62) for an individual piece to ~C$60 (~39 pounds) for a full tea service.
So averaging it all up, I’d guess, ignoring Elizabeth-caused attrition, her set was worth somewhere between 100 and 200 pounds (C$155-300), which seems about right for her.
I just saw an episode in which Hyacinth said one of her broken cups was worth 40 Pounds. (I would make the British Pound sign, but I don’t know how.)