I cleared my jw dad's house when he went into a care home. several car trips to the dump--including all those damn books and tons of magazines--going back over 50 years. also a large cardboard box full of old congregation records. i never kept a single thing.
Same here with my ex-elder father-in-law. He had bound volumes dating back to the 50's and piles of books. The local KH didn't want it so we boxed it all up and hauled it in his old pickup truck out to the dump. I had thought about saving some of it for resale but our car was already packed with other stuff.
Ironically, his bound volumes showed me, a non-JW, the TTATT. I had stumbled across this website and initially thought some the claims and stories here were rather farfetched. When we would go to his place, I'd take some of the WT and Awake references and look them up in his bound volumes and found it was for REAL. Things like 1975, generation, blood, higher education, different bible, doctrinal changes, flip-flops, etc. It changed the way I viewed the JW religion.