I went to Electronex in Sydney a couple of years ago and there wasn't anything for sale that I saw. Plenty of stuff to look at and some sample stuff, such as (from memory) a bare board LED "torch" which demonstrated someone's PCB services, a Wago demo terminal block and some old issues of Silicon Chip. Don't expect to take home armfuls of useful kit.
What you will encounter is everyone keen to get your contact details, especially if you ask questions about their products. Electronex is all about introducing people who have a part to play in selecting products and services with those who provide them.
It's rather interesting to see what is on show.