I am also planning to buy 56sqm of 140x19 Merbau Decking this weekend. I did compare a few companies prices in Melbourne. Outdeco Living in Campbellfield seems to have the best prices, I will update you guys after this weekend when i visit them.
Got my 22 sqm decking with only 169 $ per/sqm , incl. screw fixing and staining .Work was done on time and no problems at all!
Company was Calvin`s Decks and Pergolas.