^^ I think he means secondhand and unused...?
Anyway - JP's use of "epoxy sandwich" is silly as they are all epoxy sandwich. The carbon ones are certainly more fragile and the lower end "epoxy sandwich" is a bit more durable. 1kg is a lot more weight.... but for most recreational users I think it is worth it for the longer lasting board (if it is subject to catapaults and being dropped etc. If you never crash, its not stronger is it...

)