Two Joie trills LX high back booster car seats (Camberley GU15)

I have two Joie trills LX high back booster car seats available. The back can be removed so that they can just be used as standard booster seats and they each have two small drawers in the base for children to stash things in! They are in good condition and I have the instruction manual for one of them but one of them does have a couple of white marks on.