Regrets... I have had a few

With apologies to Mr. Sinatra, I have had a few regrets and some of them are real doozies.
One mistake, in particular, haunts me as I continue the seemingly endless process of home renovations, redecorating and downsizing. To this day, I still can't believe I allowed my mom to sell all of my old Hardy Boys and Nancy Drew books.
Don't get me wrong. I'm not harboring any ideas that they'd be worth a small fortune. It's the sentimental value that makes them priceless. After all, I read my first Hardy Boys mystery when I was in third grade and I still remember the first word that gave me trouble. What on earth is a ho-ax? I remember thinking as I "sounded out" the word.
Undaunted, I amassed quite a collection of the blue and yellow hard-cover books over the next few years.
Eventually, as Mom recalls, we put them in boxes and took them to sell at a church-sponsored tag sale. A little boy ended up buying them, much to my mother's disgust.
He really wanted the books, but he was thoroughly objectionable, Mom recalled. I didn't want him to have the books because I didn't like him. But I finally sold them to him at the end of the day. So I regret selling your Hardy Boys and Nancy Drew books, too.
Until next time, "That's life..."