Wow that poor thing is in terrible shape. It looks to have been neglected in almost every way, from its long nails to the deformed spine to the shortened tail. The deformities you see (spine, legs, underbite) are all the result of MBD which results from insufficient UVB exposure and calcium absorption. I honestly doubt anything you see is how it was born.
If this is your first dragon, he's going to need a lot of help. Vet visits, special diet, special care is all going to cost a lot of not just money but time as well. It has amazing colors and if you have the time and dedication, I would definitely recommend taking in this dragon. There are a lot of people in these boards who can talk you through what you need to do to make this dragon as comfortable as possible. If you don't have the time for it though, I would recommend finding a reptile rescue in your area or maybe posting the CL ad so others who may be more experienced can see if they can take him in.