u/Direct-Island-8590

Early stages in doing research. I ended up with a bunch of audio equipment from a friend. He said we can start a business together renting AV equipment OR I can keep 25% if help him find a buyer and facilitate the sale bc he's too busy at the moment to decide. This is the only picture I have until tomorrow. I'm sure there's more stuff in the boxes, but I'm just curious how much this should sell? People are asking me, and he doesn't know the current value. Where/how do I sell this stuff? Advice on testing the equipment? Maybe advice on renting out the stuff?