Short version -
Its not Ebay. Always use more than two or three virus/malware checkers, they dont all work the same and NONE of them find all issues. Once you know your system is completely clean, change your passwords (email / banking / ebay / everything).
Long version -
Its possible, but, You almost certainly did not get it from Ebay - this is extremely unlikely (a long technical explanation on how Ebays back end works). You could have gotten them from Ebay advertisements that redirect you to other sites, or from a hijacker that makes you think youre on Ebay, or literally a hundred other ways. Some people might say it could be "hitchiking" on Ebay, but that isnt exactly what it sounds like. NONE of these things mean Ebay itself is giving you anything. Why the semantics? well where and how youre getting it can determine other issues with your computer, and help you stop getting it again, and tell you what other steps you need to take other than just removing it (sometimes its not that simple).
It could be *activating* when you log into Ebay... This is more likely - there are a few that do this. If your virus scanner finds the same trojan (or two or whatever) several times when youre on Ebay, its probably because the trojan is already on your system and the checker can only see it when it activates. Logging onto ebay activates it. It also means your checker isnt removing it properly the first time - this is common - use more than one checker. Always. This doesnt mean Ebay is giving you the virus - its already on your system. On the other hand, it could have zilch to do with Ebay to begin with.
If you want to know where / how you got it, and how to avoid getting it again, Start with the basics - what was the NAME of the trojans you both had? (name or file name and pathway helps too). Each one can be quite different. and with the name youll generally know where you probably got it from, how, and what its doing.
Also, If you are only using one virus checker to scan your computer, you almost certainly have other issues (especially if you are using something like Norton or McAfee.. just because the advertising says they are awesome, and you have to pay for them,or some security website says its awesome because they are into affiliate marketing they dont tell you about, doesnt mean they are awesome). NO ONE CHECKER fixes or finds everything - each work in a different way. When I do a full scan my computer, i use 3 - 5 different programs out of a selection of about 8, for different reasons.
Lastly, if you have had a trojan, and depending on which one etc... then you might need to change all your passwords for everything, including email / ebay / online banking, as soon as possible.
