"avec" to end a sentence

[Billy Bosworth]

In discussions on France Culture I have recently heard "avec" as the last word in a sentence. It sounded rather strange, and I think it was spoken by a French native. 

Unfortunately, I can't remember the whole sentence, but is this good French grammar? 

I have always thought that in French it's not acceptable to use a preposition to end a sentence with. :-)

[George Hunt]

Fairly sure I have heard  "Voulez-vous venir avec?"

ie Do you want to come along?

I suppose "avec nous" is understood and not explicitly stated.

Are you sure that recommendation you have heard applies to the English language as in Churchill's famous quote along the lines of "pedantry is something up with which I will not put"?

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[George Hunt]

There is also this example I  found .

Not with "avec" at the end of the sentence but "hanging" ,as it were

https://communaute.mariages.net/forum/nom-du-conjoint-et-pas-les-en...

"Tout les couples invités sans leurs enfants les ont fait garder d'eux-mêmes, sans demander si ils pouvaient venir avec ou non."

[Chantal Savignat]

Hello,

Yes, it's used.

We are speaking about something, a new car, a new suit, ....

as we are speaking about this thing, adding this thing after "avec" is understood.

Man 1 : tu viens avec nous ce week end ?

Man 2 : "Oui, J'ai acheté une nouvelle voiture, elle est rapide, puissante et confortable.... tu la verras samedi, je vais venir avec.