Why are you willing to bet? You are intent on defending the status quo or just refusing to believe there could be some greedy doctors out there?
A close relative recently had a full hysterectomy in Texas, an operation that took over an hour and I believe the surgeon in that case charged about $3500 but I've not seen the bill yet. As far as complexity, I would think think the two operations I quoted are about the same in complexity, but there is a huge variance in the bills. If I'm wrong about this I'll report back and update.
I'm willing to bet because I've been very involved in medical billing, so it's an area of some expertise for me, although it's been about 9 years since I did that. Like nova said, Texas has enacted some of the best tort reform laws in the country, thus lowering the malpractice insurance cost, thus allowing the doctor to charge less for a surgery, or whatever other service they're performing. I don't know if that's the case, but it certainly is a possibility. Like I also said, there can be a big difference for different services, some doctors make their bill large, knowing full well that they're not going to be reimbursed anything close to that. The cost can also depend on the complexity, the potential liability involved, the cost of the physician's malpractice insurance, the expertise and experience of the physician, and the list goes on.