Stow n go

Hi, I'm removing my seats from my grand caravan. I don't know if I should get storage for them, ( it would cost about $50 a month in storage fees) or just try to sell them. Has anyone got advice? Because they are Stow-n-go, they may be pricey to replace. I didn't see anything on Craig's list or e-bay on this side of the country to price. Thanks