Wilson Sasha 2 Pre owned?


I am now listening to 25 year old Proac Response 3.5 speakers with Audio Research tube electronics.  Great speakers but I'm considering an upgrade.  I really like the Wilson Sabrina but now have a chance to buy pre owned Wilson Sasha 2s in the low 20's. They are about two years old but cosmetically perfect, would include a 3 year warranty from Wilson. Also, there was some kind of resistor upgrade after these speakers were manufactured and the dealer would include the upgrade.  The boxes/crates are not included.  Looking for any advice on whether this seems like a good deal, whether the Sasha 2s would be a big step up from the Proacs and whether the used Sasha2s are a better choice than new Sabrinas (which would cost less).  Have to decide very soon because there are others interested in the Sasha's. Thanks. 
brownsf
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Definitely get the crates negotiated in. I have Wilson Yvette’s and extremely pleased. 
+1 Sasha 2 - the Proac is good but polypropylene drivers that were popular in the 80's (recall Mission)  tend to have a nasal tone to the midrange.
I think the OP should consider that almost any new speaker will be of considerably higher sound quality then a 20+ year old pair of ProAc speakers. 

Our advice would be for him to consider all of his options and take a listen to the top brands of loudspeakers he can audition.

Wilson's are very good speakers, but so are a Magico, Focals, Rockports, Kef Blades, Legacy, Personas. 

The OP should examine all of his possible choice and go and audition as many new speakers that fit his fancy.


Audiotroy:
Here we go again. You have invaded yet another thread specifically limited to a Wilson question in an attempt to interest an OP and  presumably other Goners in brands that you sell at Audio Doctor (Legacy, Kef and Paradigm). 
 As you may have noticed, your post was completely ignored--- so you then posted again in attempt to make it seem like your intrusion was not sell your brands by mentioning Magico, Focals and Rockports. 
You will no doubt justify your uninvited and ignored post by claiming that you are just trying to educate the OP who you ignorantly presume has chosen to invest in Wilsons without consideration of other top brands.
As a Wilson Sasha owner who has listened at length to all of the above brands as well as the Sasha 2s and the Sabrinas--I too could "educate" the OP but I will not be so bold as to assume that he needs educating.
   We've been through this in many other threads which you have invaded to promote your wares. Why don't you stick to Legacy, Kef and Paradigm threads--- even though I must say that some Paradigm speaker threads praising Audio Doctor seem to be self-authored or placed at your request. Based on the Dave Lalin that I knew and my NY audiophile buddies knew and avoided as a salesperson at Sound By Singer---that would be a classic hard sell Dave technique.