Home page design for an e-commerce website

I am working on an online marketplace, similar to ebay, where users can post ads or browse and buy products.

The home page of my website is inspired by Google's home page. I has a minimalist design, as shown below:

I am wondering if it would be better to add a title to the home page to make it clear that this website is an e-commerce website, something like below:

Do you think the additional of header is a good option?