You need to ask.
Call every supplier that services your area, and ask them what’s the best deal they can offer you.
The truth is they want you as a customer, you’re recurring revenue for them, and they will negotiate a better deal if asked, or offer a heavy discount for new clients if you change suppliers.
I changed suppliers recently and i’m now paying under $100 per 45kg cylinder.
Here’s a list of gas suppliers operating in South East Queensland in no particular order: (there’s probably more, these are just the larger companies)
Origin
Elgas
Agas
Supagas
Plusgas
KLM Gas
Hotgas
Puregas
Note: I’m not a gas supplier, please don’t ask me for cylinder pricing. This blog post is for education purposes only