When I was a brand new grower, I picked up a $5, meter-long tree branch at a farmers market south of the Atlanta airport - it was completely covered with Encyclia tampensis and had been collected in Florida.
A couple of years later, in Louisville KY, a nursery near my office, where I purchased an unheard-of number of tropical plants, had a 24” diameter pot, overflowing with a “mule ear” oncidium and no label. They let me have it for $20. Turned out to be a ~80-bulb specimen of what is now Lophiaris microchila. (Photo from orchidspecies.com)