I was quoted $1700 for a JD 647 (which I think will work with your 2305) tiller when I bought my tractor recently. I will probably buy a 48" KingKutter tiller from TSC in the spring for about $1200.
I Have A 647 JohnDeere Tiller It is commercial Duty I have had it for 2 years I will pulverize The Dirt & My soil is Really tough soil To Break ! Also it is Set up for Imatch compatible
I bought a kk from tsc this fall when they were clearancing for 900.00 I used it so far to put in 1ac of my yard and tilled 1/2 ac for my neighbor. I LOVE it. It works great with my 2305. Tractor Supply Company - 4 ft Gear Driven Rotary Tiller
Yellow one not orange the orange one 3pt is too small.