there's no such thing as "cheap" and "good"
I vote for keep looking, and keep saving. 12k won't get you a good 33, you'll end up having issues with it and spend more in maintaining the thing I guarantee.
Don't worry about log books, use careful judgement to evaluate whether the cars appear to have been looked after. Neither of those cars excite me at all, but then I was more interested in spending up to $20k on a mint example (and loving it ). My car didn't have log books but a careful inspection by me and a 5 page report by State Roads pretty much guaranteed it had nothing to hide.