I can't say about the seller, I don't think I've bought from him.
But there are narrow t206s that aren't trimmed.
Sgc Graded this one of mine, while rejecting as miscut one that was about as short as this one is narrow. Neither showed any sign of trimming. And the only reason I can see for this being a 40 is the small white spot where ink wore off a paper inclusion. (About halfway up on the left side)
Steve B