Generally: I'm the one who buys the toys, so I'm the one who gets to keep them, easy as that. Certain lesser-quality cock rings would get tossed, but anything we shared that's sterilizable would be cleaned and used with future partners probably. Most of the collection is penetrative toys that only go in me, so there'd be no reason for him to have them.
A few things would be harder to split up, like the Sex in the Shower stuff and some bondage things.. not sure how that would get worked out. In the past I let my ex take our under the bed restraints because he paid for them but my current lad and I went splits on the coupley things so who knows. Hopefully we'll just never break up so I'll never have to figure it out