Orchid Pros- What’s The Best Way To Sell My Expensive Orchids?

My dad passed away a while. He left a greenhouse full of expensive, rare orchids. I’ve posted on Craigslist and a lot of people have come. But one guy just bought almost 5 plants for $55! My dad use to buy plants worth $3000! Each time his friends would come, he’d trade plants for at least $500. I know I’m probably getting ripped off, but what’s the best way to sell these plants without having much knowledge? I’ve heard Ebay was better… please help!