I don't think it's worth downgrading expensive rucks to TBC/Berger. TBC/Berger are not top 2 rucks, they probably will average around 80, where as Jacobs/Goldy/etc would average 90-100.
So essentially, you can make $200k-300 but u would use 2-3 trades in total, cos TBC/Berger would need upgrades in the future (1 to get TBC/Berger in, 1 to make the upgrade, potentially 1 to make funds for the upgrade)
Are 2-3 trades worth $200k-300k? I'm not so sure.