YAMAHA WX3ABIC NOISE QUESTION

[lmadigan1971]

Hi All
In my quest for my first piano purchase I came across the 1990 YAMAHA WX3ABIC upright in mahogany in what appeared to be incredible condition.   
https://www.lyrapianos.com.au/upright_yamaha.htm
Link of what it looks and plays like as well   

(This is quite a departure from the vintage C Bechstein Grand I had considered which turned out to be a lemon and was probably an over the top choice for me in regards to its size and price.) 
This Yamaha was produced late 80s to I think mid 90s which had a bigger sound and was supposedly better constructed than the standard models such as the u3 however failed to find a place as buyers could not justify the its premium price.
One thing that I did find unusual was when releasing the keys quickly there seemed to be and echo which I assume was the damper hitting the string and echoing through the soundboard.
Not a musical echo of the string at all.
I tried other pianos in the stored and they all did it to some degree but this one of the loudest. 
The very pleasant sales person said it was normal and showed me Grand pianos that did the same thing and inferred it happens in pianos with good soundboards or at least I think that's what she was getting at adding that her husbands concert Steinway does this as well but when playing a piano its not noticed.  I was a bit confused as the cheaper Kawai piano in the store was very quietin comparison as was my mothers restored 1910 Ronisch upright.
I haven't really found any discussion on this topic so maybe I am crazy and over analyzing my purchase and showing my lack of experience/knowledge.
By all means put me in my place if you feel it appropriate.

[hfmadopter]

To me uprights always sound like uprights, they just have a certain hollow sound. The tone can be wonderful non the less. Dampers returning can make a sound, though I would think it would be quenched quickly but remember that the upper treble strings tend to be undamped, so they may echo a bit. All the dampers lifting at once opening the strings certainly can make a sound, with my grand if you listen closely you don't have to play a note just lift the dampers with the damper pedal and there will be an acoustic resonance. NOt loud but present..

All I can say is if this one irritates you more than some other models then don't buy it. On the other hand it's a great sounding piano ! How does it play for you, is the action suitable to you ?