Out of curiosity, I checked how much it'd cost to convert an Ori from a derailleur to a Nexus 8 gear hub using new parts:
- Shimano Nexus SG-C6011-8V 130€
- Cassette joint + anti-rotation washers for vertical drop outs (blue+green) + axle nuts 12€
- Sprocket (16-23T) 2€
- 32H Sun rim 40€
- Spokes 20€
- Shifter (includes cable + housing) 10€
- Chain tensioner 20€
TOTAL 234€
(1€ = $1,18 = £0,90)