Seth Marks has been a liquidator for seventeen years, which is only a small fraction of the nine decades his family has been in the closeout business. &ldquo;Unfortunately, they don&rsquo;t teach it in school,&rdquo; Marks says, &ldquo;so you have to learn it in the street.&rdquo; The street, in Marks&rsquo; case, meant his grandfather and father. [...]