Collectibles found at the shore (9)
I believe the answer is:
seashells
(Other definitions for seashells that I've seen before include "Hard outer coverings of salt water molluscs" , "She might sell them on the seashore" , "Coverings of marine organisms" , "Protective homes for salt water molluscs" , "''She sells ... on the seashore'' (tongue-twister)" .)