Benjamin worth a waiver?

So I have two questions. First, someone dropped Kelvin today on waivers and I just snagged John Brown off free agents. Should I put in a claim for him and drop Brown, and if so how much would you spend?

I would hold off and see how this offense looks under Josh Allen. I like Benjamin as a large red zone target but his ceiling is capped by a poor offense and a rookie QB. Flacco looks pretty good, John Brown could be the WR1 is a more pass happy Ravens offense. Browns real concern is health because he has apparent injury history.