14060M 2-Liner Advice

[ACF123]

After a few years delay (I've previously been a Glashütte guy so this is a bit of a departure) I have decided to buy my first Rolex and, having spent no insignificant amount of time looking at different references and lurking on this forum, I am now set on a no-date 14060M 2-line Submariner (I think!).

My question is, apart from the obvious (i.e. seller reputation + condition + box and papers), are there any other nuances or factors that should be considered when it comes to no-date 14060M 2-liners?

Thanks in advance!