Cheap SRAM DualDrive hub?
Anyone who is thinking of converting a bike to DualDrive, or needs spares could do a lot worse than snap up one of these from
Decathlon:
http://www.decathlon.co.uk/EN/triban-road-5-34962561/
End of line, so reduced to £150.
Perhaps not a great bike, but the cheapest DualDrive hub I have seen is £180, and that's hub only - you still need all the extra bits like the clickbox, cassette, nuts and washers, cables and shifters. You get all that if you buy one of these bikes and the added bonus is that you get two Schwalbe Marathon Kojaks and lots of shiny new but rubbish spare parts to go in that box in your shed. Oh, and a frame. Not sure what you would do with that.
The hub is the disc mount version, shifter is 8 speed, but the hub cassette will take a 9 speed. Hub is in a 26 inch rim which appears to be eyeletted.