I also think i'd save that $200 for just a few more tanks of gas and you'll make out better in the long run.
.. i have been reading lately about another type of Fuel Energy Cell, but this one isn't a gimmick, it is a ... well ... its a HUGE gimmick, but i think its time is just about here.
Hydrogen powered cars, hydrogen powered homes, hydrogen powerd laptop computers, ....
This can work, will get cheaper, and there is plenty of air and water out there.
They are powering computers and things on sailboats right now, with some limited vehicle use, but California is interested in them, and they might power more vehicles soon.
one of MANY articles:
here is the company in Finland that makes the prototypes (HydroCell, Inc.) :