Do You Buy Speakers Without Hearing Them?

I do, I bought a pair of Revel 228be (in fairness I head the 328be before buying) and JBL 4367 unheard. Both have been exceptional. I also listen to anything I can. Locally I have access to the Kef Blade, Revel Salon 2, 802D4, Sonus Faber Olympica, Martin Logan, magnepan, entire Klispch line, etc. This I all in suburbia mid west. The only dealer that is now a bit of a drive for me is wilson audio.

When it is all said and done I am glad I went with the unheard JBLs as I think they are a step above these other speakers in key areas (dynamics, tonal balanced, as detailed as anything). So don’t be scared to trust measurements if you understand how to read them. Estimated in room measurements are the key. 

Crutchfield and others offer returns my guess have to pay shipping .I do buy a lot of opene box that people must not have liked.other dealers offer same thing wish Mac did that more for people like me in small area.the music room did that but must have had a taken advantage of because now charge 10% return.

Not never.... but rarely.  If I'm familiar with the brand and they are utility speakers, then yes.  My current surround speakers for instance.  I wouldn't do this for main L and R.

Depends.

I buy used gear and use reviews e.g here, YouTube (Thomas, Jay, audio excellence in Canada), etc and if they all say the same thing, and you know what you like you can have good results.

I just bought Gresham Studio II (50lb bookshelf) speakers which will arrive this week. 

I've never bought without hearing, but I have bought without listening.  I buy almost exclusively used speakers.  I will always make sure all the drivers work and there are no defects, but I have found there is not much point in focused listening until I get them home.  

That is of course after research and being interested in a specific set.  Then I probably know I'll like them enough to give them a real try at home.