This Saturday, SCORE! — a huge open air free market — will be happening in the Brooklyn Yards. The brain child of MeanRed Productions, FreeNYC, Newmindspace, and RefugeNYC, SCORE! is thrift store junkie’s dreamland. The way it works is simple: You bring a bag of your unwanted junk (books, records, clothing, kitchen appliances, whatever) and in return, you swap it out for other people’s junk that you need or want.