From seedlings in a flask to adulthood

[Ephemere]

I have many orchids in my collection, but they are all potted and doing well. I have never purchased seedlings in a flask, so am a novice in this field. My interest is in buying cattleya seedlings in a flask (price is $37.00 per flask before shipping, is that reasonable?). Approximately how many plants do flasks normally contain and how does one take care of these? Also, when can one plant the seedlings individually (size) and especially how does one go about that (procedure) since they are in a flask?

Thank you very much for your help and guidance!

Cheers, Michael