If you want a phat console, get a Jasper.
If you want a slim console, get a Trinity.
If you're looking to buy a RGH to sell mods on CoD/GTA, Then no it's not worth buying one.
If you want to have fun with your friends, run emulators, and make a little money now & then.
Then yes it is worth buying one.

Wizard wrote I wouldn't buy one not now.

The only reason is there are a bunch of losers now too many to count kvs will be coming to an end in the near future and Xbox one will probably be rghed

So if I was you I'd just wait until the Xbox one gets rghed

How did you work that out? I have seen no improvements on XB1 being RGH'd.
Anyways in my opinion as I've Had a Jasper aswell as a Slim, I would deffo recommend Slim.
Also a good seller that I've had experience with is Console_king and you can find him on the Xbox selling forum. But all this will depend on your location for shipping.