It sounds like you've been sent a typical "phishing" email. The email probably also gave you a website to sign into if you had any questions or concerns about the order, right?

Do not enter your information into the web site or click any links within the email you received -- it's possible that the scam artist behind the phishing email has plans to steal your personal information.

Instead, go to the online auction's main website. Log into your account and check the account history. Chances are, no TV was "ordered" through your account. Next, forward the fraudulent email to the online auction site so they can investigate. Or if a TV was ordered without your authorization, contact the auction site's customer resolution center to report the incident.