I'm talking about driving to sellers, picking up boxes full of assorted cameras, flea markets, eBay auctions filed as "box of cameras", mislabeled auctions etc. Recently picked up 5 compact cameras for 5€, they're worth 10-20€ with a bit of cleaning and testing. Friend of mine picked up same model camera in Hong Kong, paid 300 HKD, so 35€ for one.
FYI - I've been selling off parts of my huge camera collection recently, mostly over eBay and local ads. With proper pictures, descriptions and tutorials, buyers feel comfortable and safe. I've sold ca. half of my inventory for 350€. Purchasing price for my entire inventory was 200€ - so in this case, 3.5x ROI. I'm not trying to sell any of you cameras, why would I be bullshitting? Just looking for honest advice. I believe in the stats I posted.
Another idea I had - start Youtube channel and offer tutorials on each camera up for sale. New to cameras? Don't worry, here's a video explaining how to use the exact model you just bought.