I'm never buying a phone from someone again. In the future I'll just wait out my contract duration or buy cash from a Cellphone Shop.
I'm still deciding on what I should do today. Cheap phone and tether my Note 8 to it or a new Note 8.
Note 9 is R300 more per month and definitely not worth it.
Like I said before get the cheap phone.
I have proof of purchase for mine. Bought it from FNB. But it's cool if you're not comfortable.
In my opinion the Note9 is worth it. I have both and the Note9 does everything that the Note 8 does, but does it much better.