Supra Advantage Express 2 Real Estate lock-boxes?

I have to sell these on eBay for someone, but cannot find any info online about them anywhere, after extensive time looking. Does anyone know anything about these? I have about 30 boxes and 3 Supra Super Keys. The owner says they are about 7 or 8 years old. The came with sheets that have shackle codes for each one, but the PIN codes are nowhere to be found. Here is how they work as far as I know. You place the "Super Key" into the slot, push power button, and enter the pin code, then press the key button, which opens the key compartment on the bottom. I don't know anything else about it, just the entering the shackle code unlocks the shackle for the door handle. PLEASE HELP!

2011-01-27T13:22:21Z

Supra is on there, but it must have been bought out by GE or something, nothing comes up.

Landlord2011-01-27T13:35:23Z

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They are used in CA. You have to be a licensed real estate agent to open them. Those keys you have are illegal.

They are only going to be good in board area that supports them. They will have to be reactivated by the states real estate board.

Anonymous2015-08-13T18:59:25Z

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RE:
Supra Advantage Express 2 Real Estate lock-boxes?
I have to sell these on eBay for someone, but cannot find any info online about them anywhere, after extensive time looking. Does anyone know anything about these? I have about 30 boxes and 3 Supra Super Keys. The owner says they are about 7 or 8 years old. The came with sheets that have shackle...

?2016-11-09T07:08:49Z

Supra Key Advantage

Anonymous2016-03-15T06:13:00Z

Yes, and we commonly do, however only with the owners permission. Most lock boxes these days are electronic and monitor/record everyone who uses it. They can also be set to only open for a specific agent, i.e. an agent who has an appointment. It saves agents having to run around picking up and returning keys if the occupant isn't home, which gets the house more showings, usually resulting in a faster sale.

Brendan2011-01-27T13:18:57Z

If there is a manufacturer's name on them google it