Gotta make sure it's a real Billy Cook saddle, made in Sulfur, Ok.. Those from Greenville, Tx are just saddles that are supposedly made from Billy Cook patterns. Can't remember the name of the company that makes them.
I think you can buy the real thing for $1200 -$1500 new around here, depending on exactly what it is.
The ones from Greenville is made at the same place that Longhorn and Simco saddles are made. They are ok...but its just another mass produced one. They bought Billy Cooks name to use about 10 years ago or so. So he started making his "Billy Cook Maker", if it aint made in Sulfur, OK it aint a real billy cook.