SF may help with repairs. I would contact them to find out. It couldn't hurt. They are still nice lights when working properly. Of course now a days for $100 and a few tweaks you can have a hand held light that is almost equal in performance. Of course its not as cool! lol
Those rascally FFL's! Have some fun with it. I would go back and tell them, thank you for the awesome deal! Tell him you listed it on Ebay and some poor sap gave you $2500 because it turned out to be a super rare model. lol Then walk out!
Seriously to be fair, most gun dealers really don't know the actually value of these lights. I am sure a few do, but not all. The story I told you was about a close friend of mine who is a gun dealer. Many would think he knows lights well, in reality he doesn't. But because he knows guns, people value his opinion on lights. After he learned his HellFighter lesson, he calls me on all SF trade lights.
Irony is, I double check here, sometimes I PM more knowledgeable members here, before I give him a number or make a offer. Even then its possible to value one wrong. But remember this, when in doubt, walk out!