If you think that by trashing Dargo, you are going to increase the value of what you have, it isn't going to happen. We are all trying to point out the reality of the real life value of these items. If your price was such a great price, and the items such hot items, then it would have sold a long time ago. It is time that you open your eyes to the facts are presented to you. People just are not going to pay top dollar for used equipment, no matter how well you say it is taken care of. If I were to buy a used Kubota, I would be better off buying it from a Kubota dealer that is going to give me a warranty than to buy yours without a warranty, and for what you are asking, I am certain that I could buy it for the same price from a dealer. In fact, I think that for just a small amount more, I could buy a new one with 0 hours on it, and a full warranty.
Here is a auction for a BX-24 for $14.495 and it has a full factory warranty till February 2010!
Here is a 2007 BX-24 with a 60" mower deck with a 102 hours on it for a buy it now price of $15,500
Isn't a 2007 model with half the hours verses your 2003 model with double the hours worth $1500 more? It certainly would be to me and most other people, who know that if something fails on your tractor in the next 3 years, that they will have to pay for the repair out of pocket, rather than have it covered with warranty. I know some people that buy new tractors once the old one is out of warranty since they know how expensive the repairs can be when something fails.
You can purchase a new King Kutter XB Post Hole Digger Model# PHD-06-XD from Northern Tool for $695, and a King Kutter XB Rotary Tiller — 4ft. Model# TC-48-XB for $1,329.99 also from Northern. Both of these will come with a new warranty. You would be lucky to find someone that would be willing to pay you half of what these cost new, since the demand for such implements is so low. Just trying to sell this as a complete package is going to be difficult since not everyone will want everything, unless it were at a distressed bargain basement price. I think that you would have better success by breaking it down to its component parts and selling it off piecemeal.