When I was a young man, traversing the ’70s in whatever post-hippie, pre-slacker mode I could manage, I made a substantial part of my living, such as it was, in a myriad of minuscule supply-and-demand gaps that have now largely closed. I was what antique dealers call a “picker,” a semi-savvy haunter of Salvation Army thrift shops, from which I would extract objects of obscure desire that I knew were up-marketable to specialist dealers, who sold in turn to collectors. To this day I am often unable to resist a professionally quick, carefully dispassionate scan over the contents of any thrift shop, though I almost never buy anything there. Mainly because the cut-rate treasures, the “scores” of legend, are long gone. The market has been rationalized. We have become a nation, a world, of pickers.