Do not try and go on Gumtree.
For a long time, they had a wonderful section there with thousands od postings every day and everything worked tremendously well. People loved posting the ads, others looking at the ads and even answering the ads.
But as always, this is Poland.
If something works well, let's not leave it alone because it is successful. Let's mess around with it, change it, make it a site that nobody will want to go on - and the result is what it is. Rubbish, but don't take my word for it - go and see for yourself.