Sony 'trade up' program gets you $500 plus trade-in value towards a new a9

Switching brands is a painful and expensive process, but a new "trade up" promotion from Sony is trying to take a little bit of the sting away. For a limited time, people interested in stepping up to a Sony a7 II, Sony a7S II, Sony a7R II, or Sony a9 can get several hundreds of dollars in credit + trade-in value when they hand over their working DSLR or mirrorless camera. These kinds of trade-in programs are not uncommon in the photo world, but we're more accustomed to seeing them from...