I needed a new pto belt for the 1811 with a 46 inch deck. looked on parts tree and they wanted $54 plus shipping, cub cadets site was $49 plus shipping, I went to my local case ih dealer that sells cub also and got it for $44 and no shipping.
I also asked about the front left wheel spindle on my 1872, parts tree is asking $106.72. the dealer priced it to me for about $85. I have seen used ones selling for a $100.
I always thought the dealers were higher but I will check with them first from now on.