Maybe it's because he sells drunk parrots, I wonder if this is the same one that was killed, or is this just the replacement?
Chances are he sells inaccurate world maps
Fortasse, is ebrii psittici vendit.
I am not sure how to report that the o in 'novus' should be short.
"The audio do not sound correct".
I'd say it is not that the 'o' is long here but rather that the speaker intentionally pronounces the phrase by syllables, so it's OK.
He is a deceitful old weasel in a toga if you ask me!
Is 'vobis' needed in the sentence?
Without vobis it would be more like: "The new merchant is not pleasing".
Shouldn't Mercator be in Acc. here?
No, not when using a form of placere. The Latin sentence is more literally: 'the new merchant is not pleasing to you'.
The merchant is doing the action, the pleasing.