Amazon.com has 25′ ADFORS Window Screen Spline, Black (0.160" Wide) for $0.85. Shipping is free with Prime or on qualifying $25+ orders.
Link to Deal
Great to have around if you need to repair/replace window screens due to Kids/Cats/etc.
These are about $4 normally at Walmart .
https://www.amazon.com/dp/B004EBL4DI