I suppose this means formal or accidental training in art and shared taste with the art market community. I presume the minimal level of skill is identifying fa

I suppose this means formal or accidental training in art and shared taste with the art market community. I presume the minimal level of skill is identifying famous artists' work from similar pieces of not-so-famous artists, recognizing influences and obvious pastiches, and so on. I.e. someone who had credibility among the art crowd and whos purchase of a work will function as social proof of the gallerists' brand.