Just checked the 7k price, makes sense it’s 3 years ago as I don’t think it’s under 10k today. Outside of that being a rough minimum, I don’t know what it would to for exactly 6-7 condition.
There was actually a copy I saw on Instagram with the energy case for 15,750 about a month ago. Don’t know if it’s still available but I think that would be a fair price with the case being included.
The card is scarce & others have been looking for one as well, so value could drastically change on short notice. The PSA 7 you saw was cracked, put into the energy case & sold for $20k+ 1.5 years ago.