JL Audio 13W6's

I got a guy trying to sell me two JL Audio 13W6's for $600. I don't know much about JL Audio so anyone got some helpful info? What kinda sounds do these put out and about how much are they worth? I'm probably going to check them out but I'd like some info before I go see them. Thanks.

the only JL 13 series is a W7 .........

Odd... see, that's why I posted this. He said they're like 13.5" 13W6's which I had not heard of. Strange... what sould I do?

I looked it up and (I don't want to argue with you because I'm sure you know more than I do) but I found some subs on the internet that say "JL Audio 13W6" so... I dunno.

maybe they started making them .... I have never heard of them. The new W6V2's may have a 13

Yeah, I believe that's them. Well the guy wants about $600 for them and I looked online and saw a couple for $300 a piece so I figured it's average but I'm not sure... those prices could've been way cheap or way expensive and I just don't realize it...