>>9243646You could always just check ebay for everything that comes in, assuming it has a name printed on it at least. Anything that looks old is worth checking though, I would say anything pre N-Strike. Anything with a different Nerf logo than the current modern one will be pre N-Strike.
The huge moneymakers are original 1995 Kenner crossbows, if you ever see one of these absolutely salvage it.