If I can add one more:
Cattleya aclandiae - I-W These can take a wide variant of temps, which makes them fun for projects. They are not big plants and bloom early.
IOSPE PHOTOS
Clown Alley: $20
Gold Country: $15
H&R: $25 (they have two types)
Exotic Orchids of Maui: $8-$35 (they have four types)
Orchids Limited: $50-$200 (they have some select types)
Orchid Shope: EUR27
Ecuagenera: $20 (they come to Redlands so you can preorder and pickup)
Orchid Species: GBP20
Marlow's: $39
Tropical Orchid Farm: $8
Olympic: $7
Seagrove: $20
Wilhelm Hennis: EUR12.50
Andy's: $25
Wichmann: EUR20
Tropic: EUR30
Woodland: $25
Claessen: EUR6.50 (seedling)