When i trade, you can't worry about the price of the new tractor. You need to know what the trade price is. They tweak the numbers so it looks like your getting more on trade.
So you have a 2320 now, whats the price difference between a new 2320 vs a 2520?
Lets say its $2000, then you are trading for 3 years newer for $3000. Thousand dollars a year to own that kind of tractor is pretty reasonable. You have to look at that $2000 ( or whatever the price is) as an upgrade price, not just a "new tractor" price.
If you would have bought a 2520 right away, then essentially your trade price today would be around that $3000 mark.
I looked at trading my 3320 for a 3720. Dealer has used one same year and within 50 hours as mine. He went compared a new 3320 to a new 3720 price and thats what he wants to trade.