Finding filter coffee

My favourite: https://www.roastshopcoffee.com/ - typical Peruvian Light Roast 1kg Beans is 19.06GBP - 1.91GBP/100g

• 115g Mavigissey Coffee - 5.49GBP - 4.77GBP/100g
• 5x100g Mars & Lago - 22.50GBP - 4.50GBP/100g
• 250g PPP ETHIOPIA SUKE QUTO - 23SGD(13.30GBP) - 5.32GBP/100g
• 1kg Amazon Ethiopia Djimmah - 18.98GBP 1.90GBP/100g
• 227g Asda Extra Special Colombian Fairtrade Coffee Beans £3.00 1.32GBP/100g
• 250g Washed Kenya 10GBP from https://www.clanroastery.co.uk/ - 4GBP/100g