Best Buy has open box Apple Magic Keyboard for various iPad Pro 11-inch and iPad Air 11‑inch models starting at $48.99. YMMV, but seems like a decent deal if you can find one at a local store.

Apple - Magic Keyboard for iPad Pro 11-inch (1st, 2nd, 3rd, 4th gen) and iPad Air (4th, 5th, M2, M3 gen) - White [bestbuy.com]
Model: MJQJ3LL/A
SKU: 6340387
Excellent $63.99
Good $56.99
Fair $48.99

Model Compatibility: Apple iPad Air (M3) 11" 2025, Apple iPad Air (M2) 11" 2024, Apple iPad Air (5th Generation) 10.9" 2022, Apple iPad Air (4th Generation) 10.9" 2020, Apple iPad Pro (4th Generation) 11" 2022, Apple iPad Pro (3rd Generation) 11" 2021, Apple iPad Pro (2nd Generation) 11" 2020, Apple iPad Pro (1st Generation) 11" 2018

Apple - Magic Keyboard for iPad Pro 11-inch (1st, 2nd, 3rd, 4th gen) and iPad Air (4th, 5th, M2, M3 gen) - Black [bestbuy.com]
Model: MXQT2LL/A
SKU: 6340356
Excellent $66.99
Good $58.99
Fair $51.99

Model Compatibility: Apple iPad Air (M3) 11" 2025, Apple iPad Air (M2) 11" 2024, Apple iPad Air (5th Generation) 10.9" 2022, Apple iPad Air (4th Generation) 10.9" 2020, Apple iPad Pro (4th Generation) 11" 2022, Apple iPad Pro (3rd Generation) 11" 2021, Apple iPad Pro (2nd Generation) 11" 2020, Apple iPad Pro (1st Generation) 11" 2018