The thread talks about repurchasing, so some people have said Harrods is a nice treat to try but they’d never repurchase because some of those creams are literally £100s to buy. Cut and paste below of some stuff from the Harrods I would personally never buy.
Evidens De Beaute The Special Mask 30ml (Travel Size) £110 FULL SIZE
Shiseido FSLX Total Regenerating Cream 15ml (Travel Size) £114 (£380 for 50ml)
Lancaster Ligne Princière Cream 15ml (Travel Size) £57.84 (£192.80 for 50ml)
Lancaster Ligne Princière Serum 7.5ml (Deluxe Mini) £57.83 (£231.30 for 30ml)
Valmont Votre Visage L’Elixir Face Cream 15ml (Travel Size) £203.40 (£678 for 50ml)
It might be nicer for you to get an M&S one with stuff like L’Occitane and This Works, which are really nice products and also easier to repurchase as a daily item if you’re saying you’ve spent decades not buying this stuff. You could get an AC for half your budget and then use the other half of your budget to promise yourself you’ll buy a full size of the things you liked through the year.