The turn line is a factory feature. Discussed on this forum many times over the years, but some folks are new and others need a refresher.
If the revolver is properly assembled with correctly fitting parts and function-checked as it is supposed to be through the process, the revolver will leave the factory with a turn line.
Depending on fit -- which can vary slightly even in the age of CNC and MIM -- the turn line will be greater or lesser. But it will be there and the presence of it on a new firearm does not necessarily indicate anything untoward happened at or after the factory.
Suggest a forum search: there's a delightful official letter from S&W to a concerned customer explaining the turn line as part of the design...written in the 1930s. The design hasn't substantially changed since.
If you're looking at a new S&W revolver and it truly has zero turn line (look closely, sometimes they're very faint, especially on stainless), suspect an undisclosed refinish or a poorly fit cylinder stop.
This can be confusing to some folk because the Colt design does allow, when very specifically fit and tuned, for the action to work without producing a turn line. This is not the case with S&W.
As to the front end of the barrel, perhaps it's the pic or my screen, but looking closely I see only faintly some uneven bluing -- not uncommon, now or in the old days. I'm not seeing anything that clearly appears to be marring or damage, but nothing replaces having the piece in hand for inspection.
See colt_saa's excellent post on what to expect of factory bluing these days. It is what it is. If you decide to hold on to the revolver, don't use Flitz or any other abrasive to try to improve the finish; you might get a little shine, it might diminish the most superficial of marks, but it will do these things by removing some of the bluing, is not likely to produce the results you want and might take you in the opposite direction. On stainless it can help, not really on blue.
All that said, provided the revolver in question passes mechanical inspection, I don't see an actual problem here. The torn wax paper can mean anything, but likeliest is it got snagged on the revolver and shoved around in transit; I don't think the condition of the wax paper matters, or is de facto indicative of anything, but to each their own.
OP, obviously it's up to you and you need to feel right about your purchase, but nothing presented thus far says to me this is a problem gun.
