How can I find a used or open box Peplink Balance Two for sale?
You generally don’t, Peplink products are typically sold via official channels / partners / resellers.
If you’re looking for a deal maybe contact a few local partners in your area and see if they have an ex-demo unit or maybe a returned unit they would sell to you?
Buying grey market / 2nd hand from eBay or other unauthorised sellers has some risks with not being able to register the unit to yourself for InControl2 or support purposes.
I have about 30 Transit Duo and several other models if anyone wants to buy them contact me. Our company has moved away from Peplink, to Teltonika.