How much are sega palms worth and how does size figure into it?

Sego plams are priced by ';foot of wood'; per trunk. Here in Florida they are falling out of favor with landscapers because of Asian Scale. This is a pest infestation that can be controlled but not eliminated. The price , before Asian Scale, was $100 per foot of wood. This has probably dropped considerably.How much are sega palms worth and how does size figure into it?
Large segas sell for $60 and up. Size is important.