From an article titled "Why You Shouldn't Buy a Geo Metro to Save on Gas", US News & World Report, 21 May 2008 .......
"So let's look at the mileage of that 1992 Geo Metro. According to the old formula it should have managed a combined mileage rating of 38 mpg. That's not far below the 46 mpg of the current Toyota Prius, just like the Mercury-News claims. According to the revised formula, however, that 1992 Metro should actually manage only 33 mpg -- 13 below the Prius. That's not nearly as impressive. In fact, it's nearly the same rating as many current small cars. Considering that the 1992 Metro features only one airbag and earned a "safety concern" from the federal government even by the standards of sixteen years ago, you should probably think long and hard before paying thousands of dollars for one."
KBB only lists prices back to 1994. A 1994 Geo Metro in "GOOD" condition is about $1000. Your car is 2 years older than that. It is probably worth about $750 max. Don't let them push off the 70K mileage on you 'cause the 170K is more realistic. It's already rolled-over once (at least).
I would be more concerned with safety if you are gonna drive it on any roads that have other cars on it. Frontal crash rating was 3 of 5. Side crash wasn't even rated.

Personally, I wouldn't trade safety for a few MPG.
On the other hand, there are 19 ratings on Edmunds.com that give this car an average of 4.5 stars out of 5. Their owners seem to love the car and several are well into the 200K mile range or higher.
BOTTOMLINE: $2,350 is way too much. Gas mileage may not be what you hoped for as this car ages more. Safety should be factored into your decision. Despite all this, current and former owners seem to like the car as "fun and cute".
YOU GOTTA ASK YOURSELF ONE QUESTION, PUNK ...... Can you handle 49 HP at 4,700 RPMs ??