If you're interested in one at all, definitely talk to Grants Pass EV. Sean is a GREAT guy, very honest and knows his stuff. I bought my 2008 Xebra Hatchback (sedan, rather than the "truck" shown in the above pic) through him, and had him do some upgrades then ship it up to me here in Seattle (I didn't like the dealer up here).
It's definitely not for everyone, the build quality sucks, it doesn't have very much power, and it is not a safe vehicle (remember, motorcycle), but it's amazingly fun to drive! I commute in mine almost every day (the Leaf belongs to my wife, as she is continuously reminding me). You just have to know what you're getting into before you buy, or you'll be disappointed.
Thew, you can really get up to 50mph regularly? What upgrades have you done? I'm running 84v of Trojan floodies, and top out at 40mph on the flats. That's real mph, not the zap-mph. Also, I assume you're on the Xebra yahoo group? If not, check it out. Anyone interested in Xebras at all should be on the yahoo group. Good bunch of owners, and the moderators force conversations to be on topic. Lots of helpful information there.