Some general questions about the H2

[Murder after Midnight]

How big a of a difference in gas mileage is there between the H2 and H3?
Also how much does it generaly cost to maintain a H2? is the supension expensive to repair?
Basically what do you need to look out for or worry about in a used one with about(2003) 50K?

I'm trying to deciede between a used H2 or new H3 so any input would be appreciated, I leaning toward the H2 but the way gas prices keep creeping up I'm still on the fence.