Perhaps Ted means "specimen" size rather than species? A specimen-sized plant of most Cyms I'm interested in would either cost a small fortune or probably be too big to easily move. For the large species I simply don't let them get to specimen size (it would be impossible for me to shift a tracyanum or lowianum by myself in a 12" pot).
I don't limit myself to particular sizes. Often I just have to take what I can get, particularly with certain Cym hybrids - if you don't buy them when they're sold as seedlings (about 12 months out of flask), you probably won't be able to get them later.
I have everything from recently deflasked seedlings to established plants. Most of the time I don't buy flowering-size plants, though, usually because they're simply not available (or occasionally because it's more than I'm willing to pay, like the $200+ that flowering seidenfadenii can sell for).
