Ah yes....to expound a little on used iLoks and such, consider these:
1-Unless the iLok includes the account info(login and password), then the iLok will never be of any value OTHER than to use whatever license(s) may be on it.
2-If you DO get the account login info and can log on, then you MAY have some options such as:
A-Transfer any license to your account(and pay the transfer fee)
B-if you remove/deactivate all licenses, you MIGHT be able to disconnect the iLok from that account(in which case, you PROBABLY could then register it to YOUR account.
3-As said by others, for use as a spare/backup iLok, this is a bad idea and you should buy a new/unregistered iLok
4-remember that you can use any number of iLoks on any computer(with enough USB ports), regardless of who's account any belong to
