$150-$200 is about the going rate for 04 Speeds, but it sounds like you also got some accessories with it as well, so it sounds like a pretty decent deal. You probably wouldn't make a lot flipping it, but you probably wouldn't lose anything either.
Chargers aren't being sold new anymore, so you would have to try and track one down used. The going rate is in the $30-$50 range. You could also go with the CR123A mod that would allow you to use disposable camera batteries: http://www.angelowners.com/showthrea...able-batteries
There is a fella here on PBN selling pre-made kits for the CR123A mod if you don't want to do it yourself. I can't find the thread now, but if you run a search you should be able to find it.
Failing that you can go for a new board that runs on 9 volts, but the only board currently available that is designed for the Angel series guns is the Virtue, and it costs as much as you paid for the whole package. If you wait a little while, 7th Element is working on introducing a board that is expected to retail around half that price. Or you could go the DIY route with a Universal T-board install for about $75. Whether or not any of that is "worth it" or not is ultimately up to you.