What is the correct photo size to upload to an advert?

The maximum size is 128MB. A safe Pixel size is 450 x 602 pixels. No bigger than 800 pixels. If you having trouble with the size, edit the picture, select the resize option and type in new sizes. Easily done on applications such as Paint.

How do I advertise on the website?

Go to the For Sale page, at the bottom you will see the application form. Complete fully and submit to the website, once approved it will be published live.