I have these two servos left over from a fit out, Both unused and obtained this year.

8455 Specs:

Torque(6.0V) - 35.0 kg-cm (486.0oz/in)
Torque(7.4V) - 45.0 kg-cm (624.9 oz/in)
Torque(8.4V) - 50.0 kg-cm (763.8 oz/in)
Speed - 0.19 sec (6.0V) │ 0.17 sec (7.4V) | 0.16 sec (8.4)
Operating Voltage - 6.0 ~ 8.4 DC Volts
Weight - 80.0 g (2.26 oz)

8433 Specs:

Torque(6.0V) - 22.5 kg-cm (292.6 oz/in)
Torque(7.4V) - 26.0 kg-cm (361.0 oz/in)
Torque(8.4V) - 30.0 kg-cm (416.6 oz/in)
Speed 0.10 sec (6.0V) │ 0.09 sec (7.4V) | 0.08 sec (8.4)
Operating Voltage- 6.0 ~ 8.4 DC Volts
Weight- 64.0 g (2.26 oz)

Price is for the Pair, These Retail for $339 for the Pair.

So get a Bargain :).Price included shipping.