Tow/tie down mounts

I've got 16 of these mounts, they're made of 3/4" steel plate and the base dimension is right at 6" x 5.25". I have nuts and bolts (2 3/8" long) for about 8 of them. They were used as lifting points for pre-fab concrete buildings, so they're extremely strong and there's no concern of bad welds. I'll take $10 for 1, $5 for any extras you want, shipping will depend on how many you want. They'll fit into some of the flat-rate priority mail boxes, so it'll be very reasonable.