First let me say that I do not know the company you are talking about, but I have some general advice. I have had considerable experience with such matters both as a consultant and in my current occupation. I have had to pick up pieces after such attempts at saving money. Here, for what it is worth, is my two cents.
If they are seriously underpriced as seems to be the case, there is usually a good reason….ie, they don’t deliver. I have run into this one many times. I have and continue to work with and in budget tight Municipal entities and the drive to save money leads to many poor choices. The SLA you speak of could be a real problem. What is your recourse if they don’t deliver? This needs to be spelled out in any contract. There is also the expense of Court proceedings if they don’t deliver and don’t follow the contract. This is expensive and most companies end up cancelling the contract and cutting thier loses. Not a good thing to have to go to the CEO about. I would also be concerned about how long they will be around.
As far as being a DELL reseller, they may well be. You should be able to check with DELL about that. You should also check what level of authorization they have with DELL. The fact that they don’t have an online store probably isn’t a concern as you can do your own homework on DELL’s website before calling them. Keep track of the pricing and the specs on your orders though. DELL sells diferent levels of equipement just like everyone else and those savings may not be worth the trouble.
I hope I have helped a little bit. If you would like to talk further, send me a private message.
Best of luck to you.