Here is the full error that I'm receiving from M2E.
"The item cannot be listed or modified. The title and/or description may contain improper words, or the listing or seller may be in violation of eBay policy."
This is one of the most common errors preventing products from being successfully listed on eBay. You should check your product title and description to ensure that it conforms to eBay policies. Check the eBay policy on the site you want to sell on for more guidance. The eBay.com rules and policies for listing items on eBay can be found at http://pages.ebay.com/help/sell/questions/what-rules-selling-items.html