He's been the 4th or 5th banana on that team for a couple of years now. He's not a bad player but I don't think he's the type of player based off the money is asking. I'd sTay away from him.
That's a fair call.
I think you have to consider though that you have Steph Curry (an MVP calibre player) and Klay Thompson (a perennial all-star), and Draymond Green (who looks like he's going to be a perennial All-Star).
After those three guys I think you could argue back and forth who is the next best player out of Barnes and Iggy.
Food for thought though - Barnes has had a usage rate of 16.3% over his four year career in Golden State, and his usage rate last season was 15.9%. That's lower then last year's numbers for Marcus Smart (17.4%) and Terry Rozier (17.7), and only barely higher then R.j. Hunter (17.7). The guy is getting very little opportunity buried behind Curry and Thompson
With a bigger role in the offense, there is potential for his scoring to increase significantly.
There's also the fact that he has excellent physical tools for an NBA SF (6'8" height, 6'11" wingspan, 8'5" standing reach, excellent athleticism) and that he shot at least 46% / 38% / 70% for two straight seasons now, so (beyond his general inability to get to the line) he's a pretty efficient scorer and a quality defender.
Finally there is the fact that when he starts next season he'll only be 24 years old (only a year or two older then the likes of Buddy Hield and Kris Dunn) so he still has considerable upside on both ends of the court.
Will he take a huge leap moving forward in a new environment? To be honest I think he probably won't, but the possibility is there. It's a relatively low risk since at the very least you have a two-way player who can defend multiple positions and stretch the floor, so worst case is that you are overpaying for a quality starter. Not optimal, but not not really a nightmare scenario either.
I'm in the camp that says "probably don't do it" - but if we did, I could understand and wouldn't hate it.