Congratulations!!
You are living proof that all good things eventually come to those with the patience to know how to wait - A$480 for a 3.5F is surely the bargain of a lifetime (says he, enviously)...
Re the post by rayfoxlee (#4), many years ago I had an email discussion with the late Roger Hicks about the Rolleiflex 3.5, unfortunately those emails have long disappeared - I kept printouts, again alas! I can't find these in the debris of our recent interstate move with everything to do with my photography still mostly in too many storage boxes - I recall he confirmed what rayfoxlee wrote and I also remember he didn't particularly care for TLRs or Rolleis as he found them too slow to work with, being throughout his life a Leica man.
At my age, camera weight is an important factor in my photography and I too find the 3.5 weighs significantly less than the 2.8, it's also less bulky and consequently I'm able to handle my 3.5E2 that much easier in the field. My Rolleiflex Ts and Rolleicord Vb are also lighter than the 3.5s and have a better ergonomic 'feel' for me, but this is getting off-topic a bit and I'll say no more.
Now comes the fun for you of finding accessories for your new Rollei 'baby' - you'll need a lens hood and initially an H1 (UV) Rollei filter, then more filters, close-up sets (there are three available for each Rollei lens size), maybe a 35mm Rolleikin, and no end of other small bits. Prices for these can be high, but if you can look out of the clutches of Ebay you may find bargains in name-brand items out there, notably at weekend fetes and some old wares markets where sometimes sellers don't know the real value of what they are flogging.
At any rate, your first purchase should now be 120 film - in this area Ebay has a lot to offer and you may find bargains in expired films which currently seem to be on offer from a fair few reliable sellers.
Off you go with your new TLR, and enjoy! Come back to us soon with some photos, please.
PS At A$480, don't you DARE return that camera! If it doesn't suit you, sell it off to one of us for a (small) profit.