Could you licence your product to them? Or get some sort of equity? I'm just thinking that any given number as a fixed sell cost basically deprives you of the o

Could you licence your product to them? Or get some sort of equity? I'm just thinking that any given number as a fixed sell cost basically deprives you of the ongoing potential of your creation. I guess if you were smart and sold your product for, say, $100K you could invest the money and make residual income off it that way. But still. What if your idea becomes something huge. Like if someone had bought Facebook from Zuckerberg back in the day for $10K. Just a thought. But $10K does sound really low. If it's something they value, unless it's something they can replicate easily, it seems like that's just a low ball, an invitation to negotiate.