NAW. It's up to you. If a dog follows you home you don't have to let it in...
Corvairs have been plentiful and affordable for a long time. GM made about 1.5 million of them over a ten year period. Many owners parked them when they got a newer car or they broke down, and just left them sitting. When you need parts for a Corvair, buying another Corvair is a great way to get a lot of parts dirt cheap.
Recently, it seems like the Corvair well is starting to dry up a bit, in my area, anyway. Of course, nice specimens are much more rare in the rust belt (midwest and east coast). More care restorers are choosing Corvairs for their next project because they are so much cheaper than other 60s cars. Prices have been going up, particularly on the nicer and rarer examples.
Corvairs share many parts with other 60s GM parts. They are simple and generally easy to work on. Like air-cooled VWs, you can drop the entire drivetrain to work on it. The vair engine has hydraulic lifters, so you don't have to adjust them all the time. Yes, there are some parts that are unique to the Corvair, and being air-cooled and in the rear scares some mechanics. GM mechanics rebelled against them because they required a little extra "book-larnin". My dad traded his 2 year old Corvair in because he was frustrated that the local dealer would not stock parts for it. This is one of a number of reasons for the Corvair's demise. The engines are extremely long-wearing, and complete rebuilds are rare. Most owners just fix whatever is broken and drive on. There are differences that can throw the novice. Many mistakes made are due to not being familiar with them and assuming they are the same as SBC (wrong).
The good news is that there are plenty of Corvair resources. A good place to start is the
Corvair Center forum.
There's a national organization (CORSA) and clubs all around the country.
Many clubs offer free advice, shop space, and assistance. There are several Corvair-specific parts vendors, some of whom have been around for a long time.