The first two are crazy.
Nancy Drew #1 Old Clock tweed book without dust jacket
The book does not have a dust jacket and is not worth more than $10. It sold for $29.99 plus $5.63 postage. The buyer might have been influenced by the seller's statement, "Own a piece of American publishing history." Sure, but it might have been better to have selected one priced a lot lower.
Nancy Drew #10 Larkspur Lane first printing with no dust jacket
The book is the first printing of Larkspur Lane and sold for $249.99. The book does not have a dust jacket and is not in very good shape. I just sold one in much better condition in an auction for less than $60 just a couple of months ago. I do not believe I have ever sold a first printing of Larkspur Lane without a jacket for more than $100.
With a dust jacket, the first printing of Larkspur Lane is worth at least several hundred dollars in the current market.
Nancy Drew #5 Shadow Ranch with first printing dust jacket
Somebody got a good deal. The very first printing of The Secret at Shadow Ranch with dust jacket sold for $325 in a Buy It now listing.
Nancy Drew #7 Clue in the Diary first printing with dust jacket
The book closed at $2,025.10. The buyer purchased the book to resell.