As for your question, considering current Chanel prices, I think $1350 is a good deal. Plus, Chanel Kelly is hard to come by at boutiques or dept stores these days. You can also do the search the forum to find out what the approximate retail price was to determine if it's a good deal or not. There have been many threads on Chanel Kelly.
A quick search gave: Chanel Kelly owners Please help!! Chanel Caviar Kelly...r/o
etc...
I would depend on the condition of the bag. It is important to have the card though in case you want to sell it later. The price may be lower without the card.