I got this AirNav RadarBox Bundle from Amazon on May 2021 at a price of 77,11 Euro.
AirNav ADS-B 1090 MHz Outdoor Antenna with SMA Connector and RadarBox FlightStick Bundle
High performance, Omnidirectional Antenna optimized for long & short-range ADS-B ADS-B 1090 MHz reception. Shipped with a 10 meters (about 30 ft) cable and SMA connector. Compatible with any AirNav RadarBox ADS-B receiver and with other similar SMA connector receivers. Built with fiberglass & aluminium alloy for both indoor/outdoor use. Guaranteed 50-100 nm range improvement. Reduced signal loss.
The AirNav RadarBox FlightStick is a portable, inexpensive ADS-B receiver USB dongle designed for flight tracking. It includes an integrated Amplifier, Filter, and Static Protection for maximum reception range and optimal 1090 MHz performance. Track real-time flight positions, altitude, origin, destination, speed & other flight parameters and view live data on Radarbox.com and on our mobile apps.