Had it forever, don't use it much. I did a battery mod so it now runs on key fob style batteries. The original batteries are very hard to find and very expensive. If you would prefer to use them, you still can. Just clip the solder, remove the leads and stick a battery in it. As it sits you can remove and replace the battery without opening the shell.
Works perfectly, just checked it a minute ago. Comes with the case. More pictures available, and I can take a video of it operating if needed. It will come with one good key fob battery and the original dead(it actually isn't dead, but it doesn't have enough juice to run it) battery so you can have it as a reference if you wanted to buy another. Any 3-5 volt flat round battery can be used.
$50 shipped. Not extremely interested in trades but I'll listen to offers.