Resellers and Goodwill Thrift bookstores. Why do they get under my skin?

I LOVE my local Goodwill bookstore. It’s a treasure hunt with some great finds for my collection. I credit the Goodwill bookstore with me first reading my favourite authors Ursula K Le Guin. Most books are are $2.50 - $5.99 for paperbacks and $7.99 for hardcovers. Of course this is what attracts the resellers.

About once a week, you’ll noticed them with a scanner to check the value of books, grabbing anything that is in good condition. At most times it’s 3-4 people combing the whole store (which looks like a lot since the store is so tiny. This really annoys me when I walk in to see this and I’m not to sure of the real reason why. From the perspective of the Goodwill, they get their money, but it does feel like there’s something wrong going on.

I really don’t know…What’s your take on these practices?