No way its 100K, it has to be higher than that. At that kind of money, you'd be crazy to take this kind of responsibility and work on. Its a grind right now, and if you don't have a background in GI, its a very tough time to enter, because you'll need to learn essentially 2 jobs at once.
I'd say average is between 150-185K, but it really is dependent upon the territory. There are people that will be in the 140K range, but others that will be 200K+. You are paid on profitability, and your commissions are tied to the success of selling the Endotherapy disposable products. If its an area competitive with Fuji or Pentax, and your deals are discounted heavily, it would be on the lower end. If Endotherapy products are a tough sell in the area, that would make it lower as well.
The truth is, nobody really knows what the pay is right now, because the comp plan is completely new to everyone since the reorganization in July. Its a ridiculously complicated system, and often out of your control until you have a year or two under your belt. Even that said, people that have been doing this for a long time are asking if the new structure is going to stay put, because there are a TON of question marks right now. They basically took two jobs and combined them, and are paying people about the same as one. Sales are dropping in areas, because the focus just isn't there. I'd also be concerned that the comp plan next year (April on) will be different, and probably even tighter to make good money, thanks to the issues at hand.
You should ask what the Lease situation looks like (a lot of facilities leasing, which will guarantee turnover every 36 to 60 months), what the share of service and repair for the area looks like (Olympus contracts, or third party repairs?) and how the ET (Endotherapy) business is doing in the area. Do you have a local CES (Clinical ET Specialist) that will help you drive ET sales, do you have a local ESS (Endoscopy Support Specialist) that will help with reprocessing and service sales. They'll be impressed that you know this stuff, and it is important to know, as it directly impacts your compensation.
There are a handful of expansion territories that have guarantee's due to size, competitive factors, etc., so you might ask about that as well.
Hope this helps. Its a great job, but one that is seemingly being whittled down to nothing thanks to the changes to the comp plans, cuts in corporate support, and loss of some talented people. Not to mention, you have to consider the financial scandal. While it looks like it will eventually blow over, the worst case scenario would probably bring some big changes over a 1-3 year period.
At one time, this was one of the best jobs out there; but things have changed quite a bit.