I don't plan to add any leagues in the coming years, but here are some startup values I like based on
these free dynasty rankings. I'd list more rookies in general, but this site seems extremely conservative on prospects, to the point where their rankings of people like Jacobs and Sanders don't reflect the market reality.
RB31 Kenyan Drake - Top 15 PPR RB finish last year and even though he's not built to be the guy and his own coaches don't seem to trust him, he's the best offensive weapon on the Dolphins and a guy with standout big play skills and versatility. If you can get him at RB3 prices, you've done very well.
RB72 Alexander Mattison - Dalvin Cook is arguably one of the most overrated RBs in dynasty right now, and while I do think he has a chance to thrive, Mattison looms as a potential challenger if Cook isn't able to improve in his second year back from injury. Mattison doesn't project to be a special back, but is a 220+ pounder with three down ability. Decent upside at a very low entry price.
WR17 DJ Moore - It's hard to argue that he should be significantly higher than this since the WR depth is quite good and Moore's owners are likely to demand a steep price, but he flashed a high ceiling last year and this might be the last season when he's not untouchable. I wouldn't pay WR1 value for him because there's little upside at that cost, but if you can get him as your WR2 then I think he makes a lot of sense.
WR23 Allen Robinson - In the last calendar year he went from being overrated to underrated. His numbers really weren't that awful in 2018 despite a new team, a green QB, and limited opportunities. He's the best receiver on the Bears and if they dial up a few more passes next season then it's not tough to envision him as a 1000+ yard guy again. Don't put yourself in a position to depend on him because he's totally unreliable, but at a WR3 cost there's a solid risk/reward value.
WR36 Tyreek Hill - He's an idiot and a scumbag, but we know what he can do on the football field. If you don't have any ethical qualms about rooting for him then you might as well toss out some lowball offers because his PPG ceiling is something that's very rare and difficult to find.
WR49 Deebo Samuel - Probably the best WR on the Niners out of the box. He isn't an ELITE prospect, but he's pretty good and his play style means they can get the ball to him in a variety of ways. I've been taking him in a lot of rookie drafts and he's a player who would also be a sneaky option in best ball redraft leagues.
WR76 John Ross - I've always had my doubts about him and so far he looks like a bust, but this is just so cheap for a young player with a high ceiling who may yet figure it out. The risk at a WR76 value is so low that you've essentially lost nothing if he flops.
TE17 Mark Andrews & TE24 Hayden Hurst - I own both he and Andrews in numerous leagues and like both of them at their current ADP level. Despite Andrews having the better rookie year, I think Hurst is the better athlete. He was one of my favorite players in last year's draft and has a top 10 TE ceiling.
TE34 Tyler Eifert - He's never healthy, but the ceiling of a 100% Eifert is a top 3-4 receiving TE in the league, and that's well worth a shot.
2019 ROOKIE TE class - I like quite a few of them and most of them present solid value in drafts, especially the day 2 guys. When other people are throwing darts at JAG level rookie RBs and WRs, I'd consider stashing one or two of these guys and hoping that you hit a Cooley/Kelce/Ertz. Their talent level relative to their ADP represents a good value, even factoring in that TE is a devalued position is most leagues.
Mildly intrigued by: Rashaad Penny, Jaylen Samuels, Robert Foster, Michael Gallup, Quincy Enunwa, and Daniel Jones simply because he's getting dissed so hard on ADP for a top 10 overall pick