Don't ask me, Bill -
I have many of the same books as you in my collection, about ½ a ton probably, mostly bought new for the same reasons over the years, and I'm facing the same problem. My grandson seems to like trains a lot, but he's only four years old and the interest might not last through his childhood, much less his teenage years, so I'm not sure if I should set them aside for him to inherit or not. Fortunately, his mom – my daughter Cindy ('Jackelopette' here on the NGDF) – is a bit of a railfan, so most likely she'll end up with a condo full of stuff that she'll have to put in storage before renting the place out
. . .
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Roosso