QUICK HELP PLEASE THANKS: Which vape to get for my friend's b-day?

My friend will probably be smoking only a little every day or other day. I just want something that will last her a while and not give her any issues. Would be great to use Craigslist so I can get it today but if the options from eBay are far better, I'll do that.

On my local craigslist there's:

Atmos kit selling for $50 (can't find the exact model, think it's an R2, they said the kit retails for $100)

G Pro GDK slightly used for $40

And then on eBay:

V2 Pro Series 7 for $110

V2 Pro Series 3 for $35

G Pen Elite for $60

Right, so: Opinions? Suggestions? Much appreciated. Thanks, guys.