olderbudweiser,
user LMF gave you some solid advice there.....and speaking fom experience, the 2012 Gravely I bought in September had a $300 price increase for 2013 and I saved approx. $1,300(out-the-door) compared to the MSRP(plus tax) for the same identical mower for 2013.
P.S.
I went to the Simplicity website and it shows the Citation XT in a 61" to be "Starting at $6,669"......that doesn't sound like the dealer offered a huge discount(and that's assuming the website is 2013 model prices...or they didn't change....and that the $6,800 was "out-the-door"). If I were you I would counter-offer $6,500(OTD) and see how the dealer reacts to your offer.
P.S.S.
My auto mechanic(and his son) own Simplicity ZTR's and they talk very highly of those machines!!