Went and checked out the Stanley Trolley + Sockets:
Found that it was way too small and pretty cheap quality.
So went looking around for a good quality which will last awhile and found this one.
Feel free to pricematch it at Bunnings ($499 @ some Bunnings, check online before going instore) to get another 10% off which makes it $423.
United Tools has it for $475 and they are located in more states than just VIC, so if you want to price match you can do it off them too:
Sadly each of their store has their own website which can be accessed through their locate us page.