Reynolds RZR 92 Carbon Tubular Wheelset for $4363.23 at Wiggle (plus price drop)
Wiggle have the Reynolds RZR 92 Carbon Tubular Wheelset on discount for $4363.23, including delivery. This item is also in their "1% price drop per day" promotion, where prices drop by each day at 10am AEST until stocks run out.
I've calculated that it will take another 9 days to pick these up for just under $4k, if you're willing to wait that is.
Even at the current price though it looks to be good value. TBSM Online Bicycle Store has the same wheelset listed for $7849.95, while Bikes.net.au are selling them for $5624.99.