While i agree that these rims are beautiful and in demand (most likely), most of the people who have guided and offered you are pretty senior and been buying/selling for quite a while. I would advise you take their advice.
Also take into consideration that decent company rims like Lenso can be bought for well under that price, a friend got a set of new 18" Lenso staggered for that price or lower I think.
Overall best of luck!