I just ordered my copy of 199 steps from an Amazon used book seller. I ordered a bunch of used books last year for my mom who was looking for several books by an author from the 1950's. she got them all in a very timely manner and had no problems.
I just pick one with a rating as high as I can get.
Good. I don't usually have a problem ordering from Amazon sellers. I probably should've ordered my copy used, but I'm always tempted by the free shipping. My copy was shipped yesterday, so hopefully I'll get it within 2 weeks (takes a bit longer, since it's going overseas).