Would ads on Gumtree be seen across the nation?

Ads on Gumtree tend to be seen according to the browser's preference for traveling, especially for items that won't be posted. As such, if you live in Sydney and want a trailer, you're probably less inclined to look for one in Perth than one in Newcastle, so you'd filter for the travel distance. However, if the items can be posted, then more people across the country might see them. Gumtree sales can be slower than other forms of selling online but be patient, a buyer is out there somewhere for quality goods at a reasonable price.