Walaikum-assalam brother,
Congratulations on your purchase, Allah mubarik karay aap ko ye TV, you will love U7A. We bought the NU7100 from Umar Electronics, Blue Area, Islamabad. They have branches in PWD, Gul Noor Market Murree Road and near DHA II Gate 2 that I know of, they maight have more. Look man, when I bought my TV last year, I paid 84K for this TV on Daraz and it was a little lower than this a week earlier, I would say don't have regrets, it will spoil your fun with your new TV. If you can return it and buy at a lower price then you can think about it, if you can't do anything about it then just enjoy your TV.
65" is already a non-mainstream size in Pakistan and that's why companies demand a hefty premium from the people that are looking at such premium TVs. At a 108K retail for 55", you have to pay over 77K to get extra 10", coz 65" retails at 185K. I will ask the owner about last price of 65U7A and let you know. Regarding A6100, it is no match for U7A, compared side by side there is a huge difference in PQ, U7A has a great panel with higher nits which translates to brilliance and vibrancy that the lower ened TVs try to compensate with over exposure and faded picture. I have a samsung QLED as well which I bought for 300K but my U7A, while doesn't get as bright as a QLED in HDR, it still does a great job for less than 1/3rd the price.
You are correct, U7A is much better than NU7100 in picture quality, peak brightness, max nits, diming zone etc. I gave BIL my opinion but didn't wanna force him, in the end he is happy and I'm happy that he is happy with his purchase.
You can find the my picture settings at the end of my review on first page.