New? Unlikely since most of the remaining stock seems to have pulled from stores to make room for the Switch launch.
Used? Maybe in the short term, but once people realize that it has a good (if small) library, if anything it will probably eventually go up, particularly as gamepads get broken and no other way to get replaced. Unlike Wii's that are a dime a dozen, the very fact that Wii U didn't sell through very much is bound to make it a pricey system on the secondary market, particularly as its successor isn't BC.