Right, except you still have no idea why one guy was boght at $250,000 which doesn't give you any better understanding of which of the two estimates is more precise.
What if the normal range is ~130-250k or, and one guy went low because he sold in the off-hours?
maybe a four man range isn't that representative, but there are also lot of player with alot players in the tpe ;) So you could see the runaway value, i was just to lazy to put in ten numbers. And the runaway values are normally people who don't have time to watch for a cheap player, or sells who run out during server problems.
The crazyest TPE i got was betwenn 50k and 4,5 Mio with 8 transfers, i believe the top end wasn't very intresting forthe estimation of the value ^^ And i recognize at least 3 cases like that with differences of 2 mio in my rooster, in the last seasons.