Awesome car! I have no info to share or connection to it...but did buy a very comparable car three months ago from lamborghini detroit. Thought I would share details so you could have a reference point on this one.
mine was also a 2018 aventador s coupe. The sticker was $523k (yours is $500k), and had 241 miles (yours has 5,000). Mine had the 5 year lambo warranty as a $12k sticker option, which I liked—since had full 3 years of warranty left. Dealer also paid shipping to me (maybe worth $1500?)
I paid $370k. I was very much ready to do the deal—took two phone calls in one morning to decide. I did it the week before christmas (and car was in a winter geography), so I like to think those two factors worked to my advantage.
i am not looking to recommend a purchase price on this car, or to say if it is priced correctly...but if in your shoes, I would always be interested in a comparable situation...you cannot have enough data! Good luck!