Why do so many sellers take offense to offers on their listings?

eBay has an option to allow the seller to automatically reject an offer below a dollar amount the seller selects, and to automatically accept offers above a certain point, as well. Nice option, cuts the wasted time down considerably.

I've sold a lot of things on eBay, very often with the 'Offer' option. I had one item listed at $995, it was probably worth $850-900. I never even saw one eager buyers first 6-7 offers, they were so low they were automatically ignored. He started at $225, then kept adding $10. Was I offended? Nope. I did contact him eventually, complete waste of time. My favorite ones are wannabe buyers contacting me to bitch about my 'way too high price', how it's not worth that, and will never sell. I make sure to let them know when it does, lol.