Where do you buy masterpieces?

In the year of Hieronymus Bosch (500 years after his death) to see his works you could go to his hometown, ‘s-Hertogenbosch, (or, as the Dutch say, Den Bosch) in the Netherlands, otherwise in Vienna or Berlin… To buy them instead, you could go to BRAFA, the antique fair in Brussels, where available for sale were the works of one of his followers, Pieter Huys (about 1519-about 1581), and his school (two tablets of 28×38 cm each: “The temptation of St. Anthony”, “St. Christopher”), and an incision ( “Judgment day” from one of his paintings, about 1548-1570).  The fair ended on January 29th, with 132 exhibitors from around the world,  with a positive trend, growing  year after year, as the quality of the works proposed and its attractiveness to buyers. Someone already compares it to the best known TEFAF of the Dutch cousins, with which, however, competes with more “reasonable prices”, in some case even openly exposed to the public. If Bosch is not your thing, you could find a “cassone” from Scheggia (1406-1486), along with remarkable “old masters” and from a large group of Flemish painters, two works of Le Corbusier, three Renoir, four ChagallMatissePissarro, up to Haring.
We were pleased to note that scientific analyses, especially imaging ones, are increasingly produced to support the painting descriptions, such as in the catalogue of Jan Muller Antiques, where X-rays and reflectography appear.
But still many works could be investigated, to confirm or refute attributions or simply to get to know better the practices of the various workshops. For example by comparing the technique of “Portrait of Cardinal Bentivoglio” of Van Dijk, now at Palazzo Pitti in Florence, and the version attributed to his circle proposed by Klaas Muller Antiques in BRAFA, or again from the same antiquarian, the specimen of “Hercules fighting the lion”, of which another copy exists at the New York MET! Science, anyone?