Colin Gleadell presented some striking sales figures for the London Old Masters sales which have declined substantially:

The trials and tribulations of the Old Master market were played out under the glare of the auction room spotlight in London last week, where the three main salerooms accumulated just over £50 million in five auctions. This time last year, the equivalent sales made £79 million, and two years ago, £90 million. On an annual basis, Old Master sales at auction in London have fallen by 41.4 per cent from £210 million in 2014, to £123 million this year.

Art Sales: Old Masters hit highs and lows (Telegraph)