coffee is probably the most expensive grocery item BF and I buy. I buy an organic, fair-trade brand that is usually $AU8.50 per 250g and we go through that in 7-10 days.
we have always had a proper espresso coffee machine, or in the early days (5 years ago) we had a percolater. i just recently was given a really good 15 bar pump brand new sunbeam machine from my dad for my bday. now i only spend money on takeaway coffees when i'm out with people, or i will wait til i get home sometimes.