Peter Sharrer and the Getty

It would be interesting to know the source of the Greek Neolithic figures (eleven in number) and vase fragments that the Getty acquired in 1995. They appear in the published list as "donated jointly by Barbara and Lawrence Fleischman and Herbert L. Lucas". But the Getty's online catalogue tells that they were sold by Peter Sharrer Ancient Art of New York. 

Why the differing accounts? Are the listed donors just the people who paid the bills?

Lucas, incidentally, donated fragments for the krater attributed to the Berlin painter that the Getty returned to Italy.

Sharrer also sold a proto-Corinthian recumbent ram and a Corinthian lion rattle to the Getty in 1986, and a Minoan jar in 1990. Sharrer is also known to have purchased from Robin Symes, e.g. the portrait head of Faustina the Younger.