Keep in mind that's a manual "6-way" blade. You can adjust tilt and angle, but if you're doing driveway shaping and trail building, it might be a bit of a pain. Using my 350 loader to work on trails is a pain because I can't tilt the bucket (at least not side-to-side). Don't know how much of a difference that makes to you--but should be a consideration.
Also--it has no rops or cage of any sort. If you are working in brush or trees, be exceedingly careful. It's easy to get slapped, run through, or have a dead limb fall on your head....
Don't be afraid of the gasser--mine is gas and it starts instantly in all weather. But--for anyone who has one of these three cylinder Deere gas engines--I highly recommend converting to an electronic ignition and a high energy coil. Mine starts instantly, regardless of the weather. Huge difference. There are also many things to check on the frame--bolts broken or missing, and so forth that give a good indication of general condition. At least it doesn't look beat-up like many of that vintage! That sheet-metal hood is usually in a lot worse shape.
What's the asking price? I'm going to hazard a guess that if it's a dealer (as it appears) they'd want in the $7,500 ball park. Private, more like $5,500. Any service history, records?
One last thought--if it's in your area then it's been for sale for awhile. That isn't a December photograph!!! Looks more like May or June to me (grass isn't too out-of-hand).