IMHO the best D-lock on the market. So good I carry two, one for the front and one for the rear wheel, one in each pannier. I wouldn't touch Kryptonite with a barge pole, as with ttcycle, had one fail and my first Brompton L6 stolen.
As for cable locks wouldn't use any of them either. A lot give the impression of being the business, really secure, but are in reality no better than a piece of string. You lot continue using them mind as thieves seem to prefer cutting them in preference to tackling an Abus Granit X-Plus (reaches for some wood to touch).
Just make sure the one you are being offered comes with both keys and the plastic card plus the mount should you wish to attach it to your bike frame when not in use. I would ask a lot of questions about it's provenance and if ANY doubt do not buy it. Not sure if the Abus keys can be copied either......... What might seem to be an offer too good to refuse might well be. You will then wish you had bought new. What bike have you got btw?
It always cracks me up when people buy a £3000-4000 bike or even one costing a grand and spend only £6.99 on a bike cable from
Halfords. Absolute muppets.
£60-70 on a decent D-lock doesn't seem a lot to spend if you value keeping your bike. It is certainly a lesser cost than having to replace your bike when it is nicked. Anyway if you are planning to spend £35 an extra £30-40 is worth it to get something that hopefully is genuinely secure.