Wilson Watt Puppies 5.0 + 7.0 Tweeters Value?

I hope this is the correct place to ask this.

I’m not familiar with the details of the Watt Puppy evolution although I know they are an excellent speaker for the price. At least the 5.1 version and up are considered to be very good. I have the chance to buy a pair of Watt Puppy 5.0 speakers for $5K. The owner claims have had the tweeters upgraded to 7.0. I already have the year subscription to the Audiogon Blue Book. However, the price listed for the Watt Puppy 5.0 and the Watt Puppy 7.0 used is very different. The listed value for the 5.0 version is much lower than $5K obviously. Because I don’t understand all the details of the evolution of the speaker I have no idea if the greater percentage of the value is in the Watt bit (tweeter) or the Puppy bit (Woofer) or someplace else. I know there are people who are very familiar with the history of this speaker here that might be able to tell me where the value of these speakers may be on a relative continuum between the 5.0 and 7.0 version in this case. In other words does the upgrade of the tweeter to 7.0 somehow transform these speakers to the higher end version? Or is this just a bad deal. FYI the boxes for these are not included. Any help would be appreciated.