In the category "Celebrities" we currently track items of 500 persons. The most popular ones, by number of traded items, are:

Terry PratchettPhilip PullmanNeil Gaiman
David WalliamsJohn LeStephen King
David AttenboroughMargaret AtwoodMargaret Thatcher
Bernard CornwellLucy PinderWill James
Ranulph FiennesJames HerbertBilly Connolly
Lee ChildEd BookJoe Hill
Ian RankinStephen Fry 

You can find all people that we're currently tracking items for in the alphabetical index:
A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    Y    

Recent Additions:

26/05/2020: Joanna Trollope with 21 items. Brian Aldiss with 21 items.
19/05/2020: John Waters with 21 items. Hunter Davies with 21 items.