There is NO way you will get $7K for it unless you find a sucker. If I'm able to sell my 64K mile 11 bar '13 SV w/premium (built 5/2013) for $6500, it's sold!
If yours has CHAdeMO inlet (it was optional on the '11 SL), that will help.
Hope this search link work for you: search.php?keywords=carmax&terms=all&author=cwerdna&sc=1&sf=all&sr=posts&sk=t&sd=d&st=0&ch=300&t=0&submit=Search
, looking only at my posts from this year. Carmax awhile back was willing to offer me $5K.
Honestly, an '11 w/8 bars is worth maybe $4K or less.
(I bought my Leaf w/under 24K miles and all 12 bars (SOH around 91%) for $9,325 + tax and license: viewtopic.php?p=430825#p430825
back in July 2015.)
Side note: There's a guy at my work who's interested in another '13 Leaf at work. I took at look at it today and hooked up my dongle. It was a '13 SV w/BOTH packages and 11 bars, built 4/2013, SOH at 82.51% and 52.7K miles. The two folks know each other and apparently, the Leaf owner has no time to sell it and seems willing to let it go for $5K. I told him that's a good deal. The guy's commute needs are modest. Apparently, we live in the same part of town.