If you're not too picky, I've been real pleased with the in-stock strings I've been getting from Keystone Country Store. I just received two, 12 strand, 58" AMO B-50, endless loop recurve strings for $4 each. Tell me how you can beat that? While I'd prefer Halo serving over the nylon they sell it with; for price how can I complain! They also sell Fast Flight curve and longbow flemish strings with a very good selection off the shelf.
If you want something special, wait for Chad Weaver.
Jim