$300 seems high for used seats. You could probably get that much if you found the right buyer, but most people on here would either buy new, or lowball you for one of them. Missing pieces make a big difference in the value.
Yeah they are awesome. I love the seats but I'm not sure I'm that desperate to sell them for that. They have Miata brackets on sliders. I really thought they would bring more. But oh we'll I'll just keep up that's what the how much is this worth thread is for!