If you want to be heard making a prediction about this off-season that’s almost sure to come true, here’s one: There will be more prospect-for-veteran trades than we’ve seen in a long time. The reason is simple. If this year’s market in free agent position players were a grocery store, the stock would consist of one dried-up head of cabbage, two shriveled lemons, a few dusty tins of chicken stew, a couple of loaves of day-old bread, and a few tough-looking cuts of pork labeled as Kobe beef and priced accordingly. It’s the definition of a seller’s market, and any team with wares worth peddling will not only do so but will be able to fetch a great price.