The original Beetle is as mechanically simple as cars get, so from that perspective it's really not an issue. There is tons of aftermarket support for them and parts are very cheap. So as long as the car is in good condition, I wouldn't worry too much about reliability. They were from a long gone era when Germans built reliable cars. I'd check it incredibly carefully for rust. If it has that low miles (can you verify it, odometers only had 5 digits), has it been sitting a long time? That's not good for cars. The Beetle was incredibly underpowered...that little air cooled engine, while tough, has a hard time moving the Beetle around well. It'll struggle to keep up with modern highway speeds. I think they were something like 60hp. Even though the 1970 was one of the last updated versions of the old Beetle, keep in mind it's a car that was designed in the late '30s
Most importantly, I'd be worried about safety. They don't do anywhere near as well as a modern car.
I love the original Beetle. For a show car or fun toy, why not. But for a daily driver for a young adult, I definitely wouldn't. I also would strongly suggest avoiding the newer Beetle too....very troublesome car, it will empty your wallet quickly.
Since I love cars so much...trivia question...and no Googling to cheat... Most people know the story behind who ordered the original Beetle to be built and why. But do you know who was most responsible in the actual design of the car? It's a name you'd recognize today.