I recently went on the quest for new speakers. I can not imagine buying a pair of speakers of that caliber without listening first. Speakers can sound so different in different systems.
Like you I tend to buy used as I just can't afford what I like new. I listened to every pair of speakers I could to see what brands I preferred. Most brands have a house sound. I did a search for speakers with in a 250 radius here on Audiogon. I also used Hifi Shark to search sites as well as browse US Audio Mart. I did not want to deal with shipping floor standing speakers. They can be very heavy and it is expensive.
If I saw a local ad for something that interested me, I would email the seller and ask to see and hear them. See what they were driving them with. I also looked around at dealers for used or demo pairs. Some dealers don't like dealing with used gear. They will give a low offer because they don't want used stuff. They will also sell used equipment cheap just to get rid of it.
After a long search I ended up buying a pair of 1 1/2 year old Sonus Faber Elipsa SE {Red} for around half price. I am very happy with them, they are magical and an excellent match with my Audio Research amp. I could not imagine having them shipped and taking a chance on them being damaged.