I think this is an OEM bed extender. It's in very good shape and includes the brackets. Mounting the brackets takes about 5 minutes (all you need is a screwdriver) and then installing and removing the extender takes about 5 seconds. It's very handy, especially with a short bed truck.
I'm located in Boulder, Colorado, and would like to do a local sale.
$80 and it's yours. PM me or text me at (three zero three) eight eight two-eight zero eight three