So far , I think Ranking give the best price for both raquet and shuttlecork ie yonex Aero 40 at $21, so far no other shop enquire give the same price even U just buy one tube, incidentally anyone can recommend any other brand shuttle with same performance but cost lesser
Try the Fly Turnier. It is for sale for $11.80 or so. The will ship it from Germany. I think it will cost with shipping about $16 per doz if you order 50doz or more.