16gb or above

Hey All, Looking for a laptop in or around the £200 - £300 second hand, Does not need to be new, i dont mind what year it is as long as the laptop has a decent intel i5 / i7 / ryzen processor with at least 2.5ghz speed or above, but importantly has a ram Max capability of at least 16gb...

Evening all Im in deep waters here and completely out of my comfort zone so please go easy on me... My friend is a construction planner and uses ASTA for tenders and construction programs. His current laptop is not keeping up with demands and I would like to ask for your help in possibly...