Evaluation - what is the price of this banknote

There’s quite a few ones sold here with the same signature. You can use the sale prices of the ones in similar condition to gage the value of the one you have. Be sure to pay attention to the branch and year for the most accurate results.

https://www.londoncoins.co.uk/?page=Pastresults&searchterm=Five+Pound+Mahon+White&category=1&searchtype=1

Thank you. I have scrolled them and the  prices of banknotes of the same time, branch / cashier signature and condition are quite confusing - such a big difference…