So, Target is currently selling the 65B7A (older model) and 65B8PUA (newer model, same line) TV's for the same sales price of $2499.99 - even though the 65B8PUA is a 2018 new TV. Best Buy and Amazon currently sell for $2999.
The 65B7A (linked) and the 658PUA (no page on target's website yet) share the SAME DCPI in store, 008-09-0104. However, Brickseek /target online will only show inventory for the older B7 under this DCPI, not the B8. So you have to do this in-store. Give the DCPI to an in-store clerk and they'll let you know if they have it in the back. If they do, its most likely the B8. I purchased one on Friday and it rang up $2499.99 after brickseek and target's online inventory showed 0 stock for 008-09-0104, but in-store, I was told there was 1 TV in the back tied to 008-09-0104.
You can also call the store to save you a trip.