I can't tell you how much I hate the idea of trading the #34 pick for Deebo.
He's 28, his production has slipped dramatically over the past two seasons, he's relatively expensive, and he doesn't beat man coverage. Most of his catches are against zone coverage, or they're schemed.
The only reason I'd consider trading a 3rd round pick for him is because we've got an enormous amount of cap space. SF is already scheduled to be $23 million over the cap next season. We'd honestly be doing them a favor.