I didn't until I picked one up for $1 yesterday at a thrift store. It worked with a VCR to produce live-action light gun games on your TV. Only had about 6 games before the company went bankrupt.
Yep, I had one as a kid and I own the full set CIB as well as the limited edition DVD re-release of all the games now as an adult. Blue Thunder is the only game you will have a hard time getting if you decide to collect for this system. It's around a R7 worth from $30 to $50 pending the direction of the wind on the day of purchase. The rest of the games are R1 to R3 and can be had for $10 or less each. Myself I really enjoy playing the Action Max cause it's SOOOO bad it's good. The second player gun CIB I've never seen before but I know it exists and it's a lighter color of grey than the pack in gun that comes with the console. Doubt you will find anyone willing to play this thing with you more than once anyhow cause most people do think it's just that poor of a gaming experience but having 2 guns is still fun so you can be double fisted and go all John Woo on this bad boy