I recently ordered a similarly (same loader, same MMM, no ballast box, minor other differences) equipped 3320 in the Minneapolis area. A little bit less tractor, but in the same neighborhood.
My price was $24K. I've had several personal recommendations for the dealer (and the salesman), and they're 3 miles from my home.
From what I've read on this forum, I could have probably gotten it for a few points less, but there's something to be said for supporting my local quality dealer.
And, he threw in a JD hat for my 3 year old son. ;-)
Looks like there's about a 2k difference between the MSRP for a 3320 and 3520. Add in a ballast box, and I think you're in the same ballpark (pricewise) as I.
-nosualc