Only a few posts so far welcome!!
there are some regional price differences that float around they can vary by about $1,000 dollars. Do a search the button is just below the yellow header and read through what others have paid. Also in Jan.2005 Kubota did a price increase of about $1,000.
For the 3130 I would highly recommend getting the 723 loader and bucket it has a lot more ability than the 513. Do a search on that also, most everyone agrees.
Also there is a thread about tires and being charged extra for R-4's or not, if you are getting them search for that thread.
steve