Sounds like a great deal, I really like my '13 S also with the charge package, which on that model also included the backup camera not available on '13 S models without the charge package.
A year ago when I was looking for a second Leaf the '13's were still a bit new and closer to $10-12k and out of my interest so I ended up with a '12SL with all the goodies. In hindsight I wish I had waited until the '13's came down(off 3 year leases) as I really like my '13S over '12SL but it is what it is, IMO Nissan learned quite a bit from '12 to '13(3 model years from '11 intro).
In my area we have Wayzata Nissan, which I've been told(by them so take it for it is) that they are the "nations" largest used Leaf dealer. They do have a very large selection of used Leafs at any given time and said they buy almost all they see at auction. It's where I got my '12 and the experience was very good, not where I got my '13S(Walser Nissan in Burnsville MN) which was also a good experience but they don't sell many used Leafs, heck I don't think they sell many Leafs at all anymore nor when I got mine. Mine had been sitting for over a year unsold and I thought I got a very good deal at the time, $5k off sticker and with the $7500 rebate it came to a little over $20k. Still a big depreciation considering you got yours for $7600 but I've got some good use out of it and hope by purchasing it somewhat early I helped further EV production