Creative design of 1 call to action image for web

Image size:
280 pixels wide
600 pixels height
For website

Main reason for image:
Call To Action for people and antique dealers to advertise their antiques on my antiques website.

I require a call to action image/graphic design to catch the eye and attract users to advertise their antiques products.

The image will sit in the sidebar of my website and link through to the advertise registration page.

I have created a rough image (which unimaginably poor) which you can view in the sidebar here
https://antiquesstore.co.uk/product/edwardian-crystoleum-gilt-frame/

My one is basic and requires an expert creative designer to create an eye catching one.