HI,
I am worked with gumtree post ad script using python script and chrome.
The form is complex and cannot be done through Excel VBA only. Excel VBA with internet explorer browser has limited functionalities.
It will require to use some advanced tool like .Net with browser automation like chrome.
If you require script, I can show a demo through team viewer.
My script fills form, waits of dynamic form content loading and wait for uploading images.
Thanks.