Actually, you can buy a Coronado (Meade) PST for around $500. The next size up is about $1200 so they can be quite affordable. See this link »www.astro-nut.com/sun-pst.html
When you get to the 60mm and 90mm Coronados, and double stacked filters then yes, they can go for up to $7500!!!
On a pauper's budget one can do this. It's an image of mine of the Transit of Venus last year »/showpic/dimag···folder=0