Do You Buy Speakers Without Hearing Them?

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.

I have purchased several KEF speakers without auditioning and never been disappointed. Risky maybe, but I’m a diehard KEF addict and unfortunately there are no good audio dealers anywhere near Albuquerque!  

I ordered my last two sets of towers WITHOUT hearing them first.  My first ones I went with Greg Belman's Bache Audio Tribecca-001's by just talking with him and going by the specs... They turned out to be fabulous speakers for $6000 and play way above their price point.  They were custom painted and I love them.

Second pair I ordered were the Focal Aria 938's since Crutchfield was blowing them out for $3000 a pair or something crazy like that.  Unfortunately the left side tweeter was not working once hooking them up, but no foul:  Crutchfield sent me a replacement and I was back in business.  LOVE the bass response and both sets of speakers REALLY cater toward highs and voices.. .LOVE THEM BOTH, NOT disappointed.

Yes, multiple times. I have bought usually with a right to test and return, and fortunately have not needed to do so. Most have been standmounts, so shipping could have been done without freight shipping with crating and palleting. In each case purchase was preceded by searches and reading. Were I in the market for very expensive speakers (I'm not) I would travel to have a demonstration before buying.