EDIT: Got fooled by product selection game… but found a still decent sale price deal. Make sure to select "DONGLE-E"
UPDATE: Credit to @Shake for a cheaper one at ~$19.88
Ensure you choose: "Bundle: Sonoff ZBDonlge-E" it is not the default item.
This uses the silicon labs EFR32MG21 (same as the sky connect dongle) making it well supported by ZHA (home assistants own zigbee coordinator).
Hard to pin down an RRP but suffice to say at normal times it'll cost you at least $30
Previous item (~$25)
https://www.aliexpress.com/item/1005003787819769.html
Just last night I ordered the Skyconnect USB from Amazon ($75) as I want to explore Home Assistant and I couldn't find any of these (easily).
Might just buy one - Just in case! :)