Posted By:
RichardI would say that grouped as a whole, e135 is considerably scarcer than m101-4/5. However, if split up by backs, both issues have incredibly rare versions.
The easiest m101 back (blank) would be at least an order of magnitude easier than the easiest e135 back (close between collins and boston store). Blank backed m101 is probably almost an order of magnitude easier than the easiest m101 ad back as well.
Just my experience. Would be interested to hear from others with much more experience.