Should I be concerned about using a phrase "sort of like eBay, but only for widgets" as a tagline in my logo?

I have a website that is best described as "sort of like eBay, but just for widgets".





I've been using this text in some marketing materials I've sent out and think it really explains the site easily and quickly, without wasting space. I'm considering using this as the tagline on my site, meaning it could be featured in logos and print material.





Can I do this? Is it covered because eBay's such a huge icon? What if it is only used for comparison(and is a fair comparison)?





The key here is that this is also a new website, so it's relatively obscure and gets minimal traffic. I can't imagine it's worth the trouble of big companies to go after.





I guess what I'm really getting at is, is this only something to be concerned about if/when they yell at us?

Should I be concerned about using a phrase "sort of like eBay, but only for widgets" as a tagline in my logo?
I wouldn't use their name in your actual logo. There is NOTHING wrong with comparing yourself to eBay in an article or in marketing materials. But in your logo you're appropriating their name as part of yours. That will definitely get you a cease-and-desist letter.
Reply:It depends how much competition that you give to eBay, but by doing so, you are promoting eBay too. Thinking up something more unique and special for your site, otherwise, you give eBay more "impression" to your customers.


And this tagline really don't work for me.....