Seems a bit high. I recently got a 2010 with ~18k miles and pretty much all the same options you listed above for 47k + Tax. The car was in mint condition inside and out and it's a coupe which i believe are usually more expensive than the 4 door. PERSONALLY if it was me i would tell the seller 46.5k out the door (around 42k before tax/fees).
That i believe is a fair price for you and the seller.