We got our vintage photo booth from here:http://www.retrophotobooth.com.au/
They are only available in Adelaide, Sydney and Melbourne.
It cost $1600 for delivery to McLaren Vale (about an hour outside of Adelaide), unlimited use for five hours, two attendants, and a keepsake book. What I did to justify the cost was make this our bonbonerie as well. We asked people to please take home their photos, as their souvenir from the night!
For me, it was absolutely and totally worth the money. I would do it all over again if I had to. For me personally, having the vintage photo booth really made a difference. The modern ones just don't look the same. The lighting is too harsh I think. At about 10pm we bought out a basket of props (masks, a fake veil and bouquet, hats, etc) and that made everyone want to have another round!
Highly recommend this company, I thought they were great. Thinking about getting them again for my 30th, if I can fit it into the budget
Here's a couple of examples of the end result: