I am VERY good friends with the guys who run the local shop so I am there quite a bit. I remember when they picked up JL. I think I purchased one of the first W3s they sold. After 3 years or so, they had TWO JL subs come back blown(same knucklehead who just beat the hell out of them a little too much).
As one of the owners told me, "they are easy to sell, low maintenance. You put 'em in, they sound great, and don't break. What's not to like?"
Consider, at the time, a 12W3 was selling for maybe $189-$199, authorized. It certainly was not the cheapest sub in the world, but I would hardly call it highway robbery. I think MSRP was more than that, but they sold below that(as do a bazillion other JL dealers, but when people ***** about JL, they won't acknowledge that).