I was already with AGL and my 2 year 44% discount was ending. I had a flyer a few months ago so I tried the generic address listed on it, once I put in my address and went through to switch plan it says 'guaranteed 52% off'. A friend of mine got same result.
Not sure if this is a typo or not as through the normal channels a WA address is offered 51% off. I signed up for this and it worked so thought I should post so others can get it. Let me know if this isn't a deal as it's only 1% more than usual discounted price..
Looks to be the same as this deal: https://www.ozbargain.com.au/node/610546
Edit: It appears there are 2 deals here:
1: I have changed the main link to the 'better deal' - 51% off usage AND supply charges. This page has a 51% off banner, with a cartoon stylized woman figure. Check the deal before you submit the change to ensure it is both usage and supply.
2: The original link (and the deal I signed up to) has a photo image with people sitting at an outdoor table. This got me an offer for 52% off my USAGE ONLY (may vary depending on location). This link is: https://www.agl.com.au/localWA
If you signed up to this, people have has some success switching by using the online chat.