Amazon.com: UHF RFID Tag Sample Pack - 24 Assorted Pieces : Office Products
Amazon.com : NFC NTAG213 Stickers/Tag/Adhesive Label RFID Tags with NTAG213 Chip 180 Bytes Fast Read/Write/Lock Compatible with All NFC-Enabled Smartphones and Devices (15PCS) : Office Products
Amazon.com: YARONGTECH RFID Sticker tag 13.56mhz Round 25mm Adhesive Back -50pcs : Office Products
Amazon | Location Estimation in a 3D Environment using RFID Tags: Mutliple tag readers with known location and Concept of Trilateration is used to estimate the physical location of an individual tag
After testing a few 125 KHz RFID tags from Amazon, I found these to be the best. (More in comments below) : r/flipperzero
Amazon.com: UHF Monza 4QT 860~960MHZ Long Range Reading UHF tag Adhesive Tag Inlay RFID Label for Variety Application (50pcs UHF Tags) : Electronics
Impinj Surges: Is Amazon Using Their RFID Tags? | Barron's
Amazon.com : 100 pcs NFC Stickers NTAG215 Tag, Rewritable NFC Tags Round Labels 25mm (1 inch), 504 Bytes Memory Chip RFID Tag, Programmable for NFC-Enabled Devices and Nintendo Switch, Wii U &
Amazon.com: YARONGTECH 5pcs Read Only RFID 125Khz EM4100 Tags ID Keychain Access Fob : Electronics
Amazon.com: Yanzeo SR3308 860-960Mhz UHF RFID Reader Writer USB RFID Reader Free SDK User Guides : Electronics
BMES EM18 125Khz RFID Reader Module + 5 x 125Khz RFID Tags : Amazon.in: Industrial & Scientific