For a signal generator $10.97.Seen this type of advertising before $1 gets you in then Whats the freight charge?
If it is a mistake then I would not trust it either. The descriptions say nothing about the condition of the equipment.Measurement Assurance Technology is a legitimate e-Bay seller (http://stores.ebay.com/Measurement-Assurance-Technology). There maybe a problem with its software as bertus suggests, or maybe it is a rogue site phishing for personal information, as apparently you suspect.
$1 for a refurbished spectrum analyzer is too cheap. If it is a typo or software error, it is probably not required to sell to you for that price. It's nice to dream, though.
John