The numbers will be fairly low for that handle material, maybe 30-50 of them. You can always call GEC for confirmation on the numbers or ask Charlie himself. He goes by "Waynorth" on the forum. As far as being collectible...not sure what you're looking for. If you collect cattle knives, then yes, it could be collectible. If you're simply looking to purchase hoping that it increases in value, don't bet on it. No one knows what will increase in value down the road until it happens and that's due to many unforeseen factors.