Buying used or sight unseen speakers a bad idea?

Not much to add. Just to say it again - never from people with 0 and perhaps only 1 feedback unless someone you trust reasures you that the person can be dealt with safely. Not even if the speakers are free.
Even better approach. Buy only from those who participate here and whose posts are at least okay with you.
And, yes, unless it is something very rare and unique, or virtually new, never pay more than 50% the retail plus shipping.

Maybe I'm missing the point but isn't most everything sold on Audiogon "sight un-seen”? I live in the Chicago metropolitan area, point being “lots of people”, but whenever I have $$$ burning a hole in my pocket, I rarely find what I’m looking for locally. Everything I have was purchased on Audiogon, “sight un-seen”.

Here’s the proverbial local rare exception… I’m right now chasing a guy in the Chicago area who has listed what might be a too good to be true cable (emphasis added)… the only payment option identified in the ad is “Money Order”… and the member has 0 feedback. As fate would have it, the seller has failed to respond to my E-mails. In this case, I would not buy the cable "sight un-seen", and I'm close to taking Kira's “ten foot pole” advice.

I would not buy the cable "sight un-seen", and I'm close to taking Kira's “ten foot pole” advice

I would not buy any speakers without plenty of pictures. I just don't "get" guys who list speakers with no pictures.

yes plenty of pictures(close up) and may be video would be helpful.Why close up?when i was buying dyns c1 in pictures speakers looked fine.But when they arrived ,during unpacking stright away I noticed that bafles of both sides had cosmetic factory defects because of sandwich layering.At first came idea may be it is faked,then i checked up drivers, crosovers.Were original.Seller sold them 400$ cheaper for this reason I think....

Wow! I read very response. One word...Invaluable. Thank you all.

Which reminds me. The ONLY time I ever got screwed on A'gon in 10 years was by a guy with no feedback, new to the site. He got kicked off after I escalated the issue, but could of course easily set up a new account with a different email address.