OK, I'll stick my neck out here.  I live in SW Wisconsin and I just bought a John Deere 2720.  
I paid $15,330 for the tractor, $2,750 for the loader, and $2495 for the 62 mid-mount mower.  Total before tax, $20,575.  
With the WI tax the total sale came to $21,706.  I did get the 0% for 48...