If you weren't talking gift cards, I'd tell you to avoid Amazon for ham radio gear. Typically overpriced. Since you've got free amazon money, I'd suggest the the K6ARK antenna kits....when they're in stock.

https://www.amazon.com/K6ARK-100W-End-Fed-Antenna-Matching/dp/B0BMZL8MF3 for the 100w model. Other models with link to Amazon store at https://k6ark.com/kitsandparts/