I have four crossword puzzle books that are older and unfilled in. What I'm seeing on Amazon is making me wonder about whether I should think about preserving their "like new" nature. For instance, an Amazon seller has a new copy of
a Rich Norris USA Today puzzle book listed for $1,651.38. And
Patrick Berry's old crossword construction book is listed by an Amazon seller as new for $161.76. And looking at the used selection (no guarantee they haven't been written in), they yield similar prices.
Obviously sellers can put up things for whatever price they like, so given these are unique sources it's hard to tell what I have exactly. Is there any representative value for keeping old crossword puzzle books of certain types fitting with the mainstream outlets like New York Times, USA Today, etc that don't have the crosswords filled in? If so, is there any way to determine a reasonable value of these books in the range of what people might actually pay for them so I might decide whether I need to transcribe them if I want to do the puzzles in them so I don't end up ruining the value in them for being written in?