Display Unit Dilemma

Hi Guys,

One of my friend works kn Chroma, i have heard that displays unit sold for almost half of prices. Thus i have asked him for apple watch series 9. Now he is saying that series 9, 45mm is available for 20k..

Will that be a good but considering all the factors as it may not be brand new and may have been used for a year as display unit only.

Please help if anyon purchased same kinda thing in the past.