As a former Santa Barbaran, I’ve had lots of Merricks over the years, but never a longboard. I too have noticed the much lower prices for Channel Island longboards in shops compared to others. I assume one reason for this is that they usually lack the fancy glossy finish that other shapers/glassers spend hours putting on the boards before sale.
I’ve owned a couple CI boards, right now I have a 6’6" fish, and its awesome, nice tints and gloss. Good mushy board for summer, but not a longboard. A guy I surf with has a RA and he uses it almost year round, he’s very pleased with it. Its a 9’6" i believe.