Amazon.com: Kumeai Bluetooth UHF RFID Reader Writer for iPhone,Mac,Android,Windows,Linux. Read 50 RFID Tags Per Second, Free App and SDK (PR02) : Electronics
Amazon.com: YARONGTECH 5pcs Read Only RFID 125Khz EM4100 Tags ID Keychain Access Fob : Electronics
Amazon.com : Printronix SmartLine SL4M Thermal Label Printer With RFID : Label Makers : Office Products
Amazon.com: 50 Pieces NTAG215 Sticker Black NFC Tags Round, Blank NFC Stickers 25mm (1 inch) RFID Tag Labels with 504 Bytes Memory 13.56MHz Chip, Compatible with Tagmo Amiibo and NFC-Capable Smartphones :
Amazon.com: YARONGTECH RFID Sticker tag 13.56mhz Round 25mm Adhesive Back -50pcs : Office Products
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 RFID Tag Impinj H47 True 3D Sticker 860-960MHZ Monza 4 915M EPC C1G2 ISO18000-6C can be Used to RFID tag and Label (Pack of 20) : Electronics
Amazon.com: 100pcs UHF RFID Labels, 860-960MHz Reusable Anti-Theft Electronic Tag Smart UHF RFID Tag for Jewellery Display Watches and Glasses Counter Display : Industrial & Scientific
Amazon.com: 13.56mhz tag,RFID Key,Iso14443a RFID tag (Pack of 10) : Industrial & Scientific
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: UHF RFID Tag Sample Pack - 24 Assorted Pieces : Office Products
Amazon.com : 10 Pieces NFC Sticker/Tag/Adhesive Label RFID IC 13.56MHz ISO14443A 1k : Office Products