Shimano SLR is really nice stuff. That's what I've got on my bikes. Jagwire is what I used to use, and use when I occasionally flip a bike. And stay away from that disgusting crap they sell at x-mart.

As for using it on flip bikes, why sell someone a half-assed bike whose cables are going to work less than optimally even when new, and rust up in no time? Jagwire isn't that expensive. Especially if you buy it from a place like Niagra. Even at the LBS, which is where I always get mine since I don't flip much, it's not that expensive /foot. When I overhaul a bike, I clean it well, repack all bearings, new bar tape, make sure tires and chain are decent, and use decent cable housing(basically always needed) with new cables(when needed). I advertise as much in my ad(that I've done things right with quality products and include what products I've used) and always sell my bikes for a great price right away. People appreciate a clean, well tuned bike with decent parts. And the lined housing is going to result in better braking and shifting, which is more likely to please them on a test ride. Why not do it right rather than skimp and give someone crap housing? ...Sorry to get off topic. I just really dislike reading things like that.