Inferno, I got my Dragon Fruit, Hylocereus guatemalensis, at accentsforhomeandgarden for 4.95.
You might be looking for a larger size..he ships plants in 4" pots. Pots are compact and plant is usually anywhere between 5-8" tall.
Check it out..Toni

i think they are all self pollinating besides for red jaina.

i have a few different varieties, dont pay 70 bucks for a cactus.

they grow effortlessly down here, easy to ship and propagate (just clip and stick in a pot and water)

im sure you can find clippings dirt cheap