An item is only worth what someone is willing to pay at a given time. Just because someone offers $50 for a chase piece doesn't mean the seller will take that offer, but with the economy being the way it is, many colloctors are selling their collection, and many good deals can be had.
The older JL White Lightnings are still desireable to some collectors, but not so much to newbie JL White Lightning collectors.
The WL Shelby Mustang in this series is still a "Holy Grail" for a lot of WL collectors. A couple have sold for well under $200 recently. I remember when the #001 sold for around $1300 just because it was #001.
The #001 WL Roadrunner in this series sold for around $1200 just because it was #001 (that was several years ago). I have #010 of the WL Roadrunner, and I'm happy with it.