To deny the validity of the droit de suite is not to be a philistine: arguably, it is more philistine to equate the valueof a workofart with its price.
Filer (1984) comes to an identical conclusion: the DDS reallocates property rights: thus, the valueof a workofart without full property rights is less than the value with full rights.
When evaluating a potential purchase, an entrepreneur like Courtauld was looking for an assessment finely balanced between market value (a good price), quality as a workofart (a question of informed taste and a good eye), and stature of the artist (now and in the future).
Having good art is an amazing opportunity to teach them the valueof living with good things and appreciating the creative process behind the actual workofart.
Auction house specialists will tell you that for any artwork or collectible, a celebrity association or former celebrity owner will bolster the valueof that piece, not just the next time it is offered for sale, but in the future too.