Origin: Latin suffix -able
Collectable has 4 different meanings across 2 categories:
things considered to be worth collecting (not necessarily valuable or antique)
"My grandmother loves buying collectables like vintage postcards and old baseball cards just because she enjoys having them on her shelves."
Anything that someone might want to collect.
"The vintage comic book on my shelf is a true collectable for any fan of classic superheroes."
subject to or requiring payment especially as specified
"a collectible bill"
"a note payable on demand"
"a check payable to John Doe"
Suitable for collecting.
"That vintage baseball card is a rare collectable that many players would kill to have on their wall."