It's a long shot but I'm looking to buy or trade for new or hardly used and in great condition WF4 first generation Sage Performance Taper fly line made by Scientific Anglers. Here's the box for the SA-made line, which is a pale yellow color:
Attachment 19745
PM me if you've got one you'd consider letting go. If open to trade, let me know what you're looking for in 3-6 floating lines.
Thanks for looking.
Chris