You could get a MC999 from Ebay when not following common stealth procedures. There are four primary things that Ebay will use to link, suspend, or ban you. 1. IP Address 2. Browser and Flash Cookies 3. Personal Account Details 4. Same Account Activity You can also get a MC999 from doing the following: Buying and selling items on Ebay that are priced between 0.01 - 0.99. Selling to much to fast on a new account. Selling way to much at one time. Selling certain items when the account is first made. Especially when the account does not have a good selling history. The certain items are: 1. Brand new items, unopened, boxed, sealed. 2. Electronics. 3. Cell phones and cell phone accessories. 4. Name brand items. 5. VeRo items. 6. Digital items. 7. Counterfeit items. 8. High priced items. 9. Duplicate listing of the same item on a new account. In my personal experience I sell household items, flea market items, and garage sale items for the first month on Ebay. You want to let your sells rest after every sell. The only real bad MC999 I ever got was proof of merchandise that was hard to get past because I was selling way to much at one time. The account was even a top rated power seller that didn't have one negative feedback, one return, one opened case against me, or one bad message that was a complaint. Other than that I have had no problems with any of my active stealth accounts doing what I have stated above.