Thing is, even if you don't need Perriman, he's got a fantastic shot at tons of volume in the Ravens offense this year. You may be selling him at close to his true value given the risk, but there's a non-negligible chance he puts up good numbers this year and you'll kick yourself for selling too soon. SSS and Aiken leaving frees up 150 targets, and Perriman already saw 66 last year. Factor in that Pitta saw 120 largely by virtue of being healthy all year (and nothing against Pitta, but it's a decent bet for any TE to miss a couple games, especially one with his history), and the RB stable altogether saw another 140 targets (so even with Woodhead signing, it isn't like the RB target share is likely to increase), and you start to realize the massive opportunity for volume staring Perriman in the face. If you double him up to 130 targets (for a 19% target share, not too crazy, and leaves ~90 WR targets up for grabs for an FA or rookie to take), he improves his catch rate to just 55% from 50% of last year, and he maintains his yards per catch, you're looking at a 24 year old NFL first rounder putting up a line of 72-1080-6 or so in his 2nd real season. The narrative will change to "he's finally showing his true potential, no reason to think he can't stay healthy from here on out, he'll enter 2018 as Flacco's WR1 and will have low end fantasy WR1 upside" etc etc.
Since you're not getting a huge haul, I would personally hold him and hope he hits well this year. Worst case, he disappoints again in 2017, and you'll still be able to sell him for a late 2nd or so. I don't think Perriman is going to be some legit perennial WR1, but I think you really run the risk of selling a year too early if you sell now. Better to let him simmer on your roster and see what you can sell him for if he breaks out.
