When quoting construction equipment and agriculture equipment, such as backhoes, wheel loaders, bull dozers, forklifts and cranes, make sure that you get all dimensions. The most important are length, width, height and weight. If at all possible get the wheelbase also. The wheelbase is important if you are going to put it on an RGN trailer. I have found that most customers do not have the information needed to give a proper quote, so you will have to find it yourself.
A good resource is http://www.ritchiespecs.com/.
They do not have all equipment listed but they do have a majority listed. Most of their listing have all the information that you will need.