I have also seen this pattern with this collector 
for years.  I have lost track of how many times 
she 'quits the hobby', to have her resurface and 
buy up cels then try to resell them at huge 
profit.  It gets really old.  She has some cels I 
am interested in, but as soon as I see its her on 
ebay I quit that page as have no interest feeding 
her bad habits.