In reply to Clauso:
I agree with the recommendation to go 2nd hand but the T430 is now antique.... A good performer but dreadful screens on most of them and now nearly 10 years old. Fine if OP needs to come in at the bottom end of the budget I suppose - it would definitely chug along for a couple of years.
For the OP: sounds like you just want a standard-issue laptop i.e. the sort of thing that you would be given by your IT dept if you worked in a bank... You can get these 2nd hand on ebay, either Dell Latitudes or Lenovo Thinkpads. They tend to have better keyboards and build quality than stuff marketed at individuals and they are a bit "plain".
A 14" screen is probably about right for your use, it's the size of an A4 page more or less.
I have had a quick look and - for example - there are some vgc Dell Latitude 5400 in budget with 8gb RAM, an SSD and an intel i5 8th gen (and a USB C port which will be useful if you are keeping this for 5+years). These have a good balance of price/performance/ports/repairability/usability.
Often you can find examples with the original Dell or Lenovo warranty too since a 3-year warranty is common for business laptops. Lenovo warranties definitely remain with the laptop and I think Dell ones do too, so that gives some peace of mind as you will be covered e.g. to 2023.
HTH