It really doesn稚 matter to the dealer weather you pay cash, finance privately, or finance through the manufacturers credit arm. The dealer gets the same amount of money for the transaction
no matter where the payment comes from.
As my Deere dealer told me, the low cost Deere financing is really a buy down of interest... finance with Deere and you don稚 qualify for the cash back incentives, but you still get the dealer discount (part of the markup he is willing to share with you).
Bring either your own cash or a check from your credit union and you get the Deere corporate incentives available at the time, plus the dealer discount, but thereç—´ not an additional discount for cash. Your roll of $100 bills is no more valuable than a check from your credit union.
For some reason I don稚 understand, many people, particularly older people have the misconception that walking in with a wad of bills gets them a deeper discount. I don稚 see any rationale in that thinking.