Before he joined the rangers he was averaging 10-20 goals a year for about 5 years. He's already 30 so his legs don't have much time left and as soon as he loses his legs he loses his career. He's definitely not worth a first or a good prospect.
Lets break down "Before he joined the Rangers".
In 2009-2010, he scored 5 goals in 20 games. (Looks good for 20 goals)
In 2010-2011, he scored 34 goals in 76 games.
Lets look at the
5 years before joining the Rangers.
In 2011-2012, he scored 20 goals in 76 games.
In 2012-2013, he scored 16 goals in 45 games. (Nearly 30 goal pace)
In 2013-2014, he scored 12 goals in 64 games.
In 2013-2014, he scored 8 goals in 34 games. (8 goals a little misleading here?)
In 2014-2015, he scored 9 goals in 80 games. (Bad year on a really bad team)
With the Rangers.
In 2015-2016, he scored 27 goals in 76 games.
In 2016, he's scored 8 goals in 18 games.
He's been much closer to a 20 goal plus player than an in-between 10-20 goal scorer for the 5 years prior to joining the Rangers. He had 1 bad season in 2014-2015, but a 20 goal scorer is definitely worth a late first. The problem comes in with his contract, he's a UFA, so it's a gamble unless teams think they can sign him. I'd personally want a 2nd round pick and a good prospect if we didn't have buyers for a late first (top of the league teams)