I had the idea of buying a really bad, cheap knife so I can blunt it and use it for knife play. If anyone can recommend some good sites, let me know! Primarily looking for something that looks intimidating but isn't marked up to scam mall ninjas.

Edit: just some details on my process. I'll ruin the edge with a paving slab, but I won't use any impact as I doubt a cheapo knife could withstand it. I'll be extra careful to round off the tip. Will finish with some sandpaper. Looking to get the edge to at least 0.3mm wide by the time I'm done with it. Will probably round it off to simulate an edge. I do like the feeling of an edge but I want my partner to feel comfortable using it.

Edit 2: looking for a fixed blade knife, over 4 inches if possible.