These are considered derivatives, and it is expressly frowned upon by the logo owner. Use policy of the logo clearly outline what you can and cannot do with their logo...
especially if they are to be "associated" with the parent company (a new image on a site that links to the facebook page is a no no per their guidelines, unless it falls within the parameters they have stated)
Technically, you cannot claim "IP" to a redesign of a logo because trademark law covers the original from such a claim. You are copying their work, re-purposing it, and then claiming it as your own for sale... huge liability there.
You can certainly sell it, and make a little money on it if you wanted to, but it's not to say that it is legal, right, or acceptable. If you get caught, hefty fines could be imposed.
Your best bet is to go right to the source... here are a few examples to find out how THEY want you to handle their logos...