i have these items and was wandering if the creators might want them back or can i sell it ?

the items are

Device of Light Electric Rodent Companion Helpful Morostide Companion Jollin Print Iron-On Transfer Pearly Treble Clef Decoration

It looks like all of these are public items, so you're free to sell them without any problems! The only one I'm not sure about is the Helpful Morostide Companion, but it seems like it might have been a special release for Halloween with no selling restrictions. Might be worth asking the releaser, who is listed below!

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