This seems rather cheap. The 8050 series is cheaper than the 6870 series at Pushys.
The front derailleur is $183.99, rear derailleur is $219.99, after the discount. You have to make two separate purchases if you want to buy both, as the discount is off the whole cart.
The new RD lets you use an 11-30 cassette, the 6870 only allows 11-28.
8050 parts are backwards compatible with 6870, if you just need to replace a component.
The sale ends at 11pm AEST today!
FD:
$290.98 at Wiggle
$301.49 at CRC
how many grams are they?