i think it's more interesting to set a goal ... how many km do I need to get out of it for it to be deemed a purchase that makes sense at the price point?
10km
100km
1000km
10000km
100000km
£1/km
£0.1/km
£0.01/km
£0.001/km
£0.0001/km
current: 245km and £1.57/km