A couple quid I'd guess, yeah
Surely an unlock code would be cheap for this age of phone?
If you're willing to go the grade B route from cex it's only £115, locked to EE mind https://uk.webuy.com/product-detail?id=shuap10p128gbeveb&categoryName=phones-android&superCatName=phones&title=huawei-p10-plus-128gb-black-ee-b
Released April 2017. Good year. Better than 2020.
It's still hot for me, if you know what this camera can do. And it's quite compact phone, a rare thing nowadays...