A fairly routine story, below par from an author such as Lee.
A fantastically rich collector of objects d’art is desperate to obtain a piece from a famous sculptor. Problem is, the sculptor is famed for publicly destorying his sculptures immediately after their showing to the public. At first the sculpture refuses to sell a sculpture, but then agrees, when the collector suggests that the piece will be delivered to him in a sealed compartment, and nobody will be able to see it.
Finally, after many years, the collector breaks his vow, and takes a peek…
The sfnal element is simply that it is set in the future, although there’s no reason for it to be set in the future (other than the hi-tech security on the safe containing the sculpture).