For making your own coffee, that's expensive. Whether it's home espresso, aeropress, French Press or pour over, you'll be using 15-20 grams per serving; 70p per serving is at the higher end of the scale.
If people accept this as good value, we might see the end of the real good value beans that are available. I don't wish to jump on your balls, but what are you actually comparing that price to?
What are you basing your opinion(s) on? What do you consider to be good value beans?