Watch out for the Motorcycle Scams (and  many other big ticket items like boats, tractors, cars, etc...).  These scammers have hijacked people's ebay accounts.  Don't ever answer an email saying you need to respond to verify your ebay info. This is how they hijack your info. Commonly called Phishing.  If you did respond to one of them, go change your password now, or they will change your password and lock you out of your own account. (ebay is not very responsive, so it may be a while, if ever, before you get it back)

Price too good to be true? (nothing is free, stop thinking you'll get something for nothing)
Private bidder ID's?  (yup, they don't want you to correspond with another possible Victim, and Also to SHILL the bid up to make it look Legitimate.  For those who don't know what Shilling is, it's when a user will create several bogus accounts or get friends to bid up the item in small increments to either raise the amount or make the auction look legitimate.)
Private Auction? (they want to see an email from you for the chance to talk you into the deal, and Steal your Money)
Email address? (they will provide an email address instead of using the ebay mail system, they don't want you to communicate with the person they hi-jacked the account from)
Ebay or Square Trade Warehouse?  (That's just Stupid, There is no such thing)
Seller is overseas (usually UK) but the unit is in the US?  (There is no unit, it's a Scam)
Shipping a tractor? Don't fall for the free shipping line.  Larger bike will cost between 500 & 1000 dollars to ship.

What they are looking for, is for you to send them (usually via western union) a sizable down payment.  If you do, that will be the last you hear of them and You will lose your money.

When buying a Large ticket Item on ebay including motorcycles and cars.  Negotiate a very small down payment if any, before bidding. (enough to cover the ebay fees) If they won't accept those terms, I don't buy.  Fly or drive to view and pickup the Item, and pay for it then, not before.  Seller's who are honest will accept these terms, they have nothing to hide or worry about.

Ebay doesn't seem to have the resources to patrol millions of auctions, so we (all of us) need to do it.   Please use Common Sense when buying large ticket items.  If something is to good to be true, it is, 99.9% of the time.

If an auction takes you to to an ebay sign-in screen.  Beware scam artist link to a bogus ebay sign-in website.  Another way a scam artist phished for info to steal an account.  If this happens to you, hit the "back button", but don't re-sign in.

Something else you can do, is to report a Scam auction to ebay.  It's easy to do.  At the bottom of every auction is a link to "report this item". Click on it, then choose Fraudulent Listing.  The rest is self evident.

There are thousands of scams going on like this throughout ebay, not just Motorcycles.