Shift shaft seals are cheap and doing them requires removing the left side case cover and a couple hours of work. With that low of miles, there probably isn't too much wrong with it. Yeah, you do want to drive it before buying. It would be nice to know if it had been driven and/or started a couple times a year. You might ask what kind of gas is in it and/or if stablizer was used, since you may have to go through the carb and clean it up. Look to see if it has somewhat clear and clean oil and if the chain has oil on it. At least that lets you know it may have been cared for a little.
Good luck, hope you get it!