The reason to keep old pubs is to have the actual documentation of Botchtower BS. So when someone fresh in the Borg says "Oh they didn't say that." you can show them otherwise.-Heaven
I think thats a good idea for you to keep them. Personally for me when I encounter JWs I taqlk about how unscriptural the RI process is and compare it to Luke 15.11-24 about the Prodigal Son. This is what is close to my heart and helps the JW think of me as an individual with a unique set of circumstances that can apply equally to them or their families.
I tried 5 times to get RI'd, si I tell them that it was my best and I don't believe the process was scriptural.
I have kept 4 bibles all different translations, versions.
Kate xx