My apologies for not responding to this sooner. I will admit I exaggerated the 5-10 mark. There's roughly 20ish guys in that first tier. I'd have all but Crawford ahead of him, as you do, but Seager I wouldn't assume as a shortstop, unless you also consider Hanley Ramirez a shortstop. He's a great offensive prospect who can play passable short, so he'll stay there for now. Miguel Cabrera played short until his last full minor league season as well, and he even played outfield for three seasons before moving back to 3B. Seager's a passable shortstop, but he's most likely moving off the position quickly, if not this year, then before he hits the major leagues. To the point, the main difference is the amount of time left that a team can develop a guy. I'd actually knock someone down in trade value somewhat if they've already done one of two things - 1. hit AAA, or 2. lost some significant upside potential. Lindor has actually lost some of #2, but not to a significant enough level to knock him down too much as he's shown some exploitable holes in his offensive game. A guy like Barreto is so supremely talented, provides power and speed offensively at a very high level, and he's done "stathead" things like drop his K rate by 5% and raise his BB rate by 4% in his first year of full season ball at age 18. The only question about him at this point is future position, but he has the arm and range to play SS/CF but the size that normally translates to 2B/CF long-term. In scouting, the closer to the majors a guy gets, the better his 20-80 scores get because there's more surety, and scouts hate to be "that guy" who put a 70 on a fastball that in the end is really more of a 55, so there's err on the side of caution. Barreto already is receiving 55+ ratings on his speed, arm, and bat control, which is essentially saying that he's at MLB starting caliber level with those tools. Now, that alone does not a baseball player make, but it's a huge mark forward. When a team has little time to work with a player, there's lesser value to them as they cannot teach their system's philosophy to the player. A guy traded at AAA has usually had 2-5+ years of training in an organization, and if the approach of that organization is to work the count and strikeouts are okay as you wait for your pitch and then moves to an organization where there's a pointed focus to reduce strikeouts, you often see a year or two step back for that player as he adapts the years of training he's had to the new approach. It's also why you often hear of prospects that were hyped being traded multiple times and becoming late bloomers because they need time to put it all together. I personally believe that Jason Heyward would benefit from a couple of years with the same hitting philosophy as he's had three hitting coaches in his five year career. His best season may still be his rookie season when his MLB hitting coach was the same coach who had set the Braves' hitting philosophy for all of Jason's time in the minors. Teams value the ability to put their print on a guy, and Barreto's 2-3 year likely window before he's in the majors is in that perfect window of development on an 18 year-old kid to make his trade value skyrocket. I'll use an example from the Braves farm system. Right now, the clear #1 prospect in the Braves system is 2B Jose Peraza, but I would wager that it would take as much or more to pry SS Ozhaino Albies away from the team in trade right now. He's going to end up a top 5 prospect in the system and at 17 blew through the two rookie league teams in his first experience stateside while striking out at a sub-10% rate and walking at about a 12% rate while showing a ton of baserunning ability and surprising power. Peraza is only 21 next season, but he's already been moved off of SS and his power has shown to be in gap/ally power only, not really over-the-fence power. Still useful, but taking a possible skill off the table does lessen what a trade value for a player is when they're early in development. Peraza's also already reached AA, so he's hit the high minors while Albies is going to his first full season club this year. I know this is TL;DR, but I think I explained stuff a bit better. I will say that this concept had to be explained to me by a former scout I sourced for a story a few times over before I got it.