IMO it's to avoid the buyer that wants something for next to nothing. Not all sellers are destitute, maybe they don't want the audio room or storage area looking like a cluttered repair shop. I have several boxed items to sell but don't want any dealings with buyers having a garage sale mentality.
Why do so many sellers take offense to offers on their listings?
If you have the 'offer' feature activated then what's the problem with any offer. Comments like 'lowball' offers will be ignored just gives me a bad vibe. If your item has been up for sale then there is no insulting offer. I've made deals with people starting far apart and coming together. If you haven't noticed the audio market seems to have come to a standstill. Any opinions?