"Uh... I wasn't really wanting to trade, just checking what I had..." Geoff said, "I thought everyone was sharing stuff anyway..."
He also didn't want to part with those things. The rod was his melee weapon, and he preferred to have it around. And the notebooks definitely weren't for trade either. Most were just filled with doodles and stories he wrote in school, and the fourth one his post-nuke journal... which he forgot to update again.