I'm short on space at the moment, and rebuilding a collection so am buying quite a few all at once.... I've gone the seedling route for a lot of them, to save both money and space (also because species can be hard to get here, so internet auctions have been a great source for me). I'll be quite happy to wait a few years to see any blooms, and it will be very rewarding to know I've cared for a plant for so long.
I've also bought a few slightly neglected plants or division, either from people moving or via the local orchid society. They add enough variety - and a few blooms - to my growing area, so it isn't ALL just seedlings and very small plants!