Some info on 2017 starting salary prices has started to be revealed by the HeraldSun.
Looks like Heppell comes with a 10% discount for 2017 on his most recent season average.

CURRENT BOMBERS

Dyson Heppell (Mid) $513,300
Brent Stanton (Mid) $496,100
Michael Hurley (Def) $464,200
Jobe Watson (Mid) $453,300
Cale Hooker (Def-Fwd) $444,900
Ben Howlett (Mid-Fwd) $375,800
Travis Colyer (Fwd) $332,100
Tom Bellchambers (Ruck) $305,100
Heath Hocking (Mid) $300,100
David Myers (Mid) $133,700

FORMER BOMBERS

Patrick Ryder (Ruck-Fwd) $418,100
Michael Hibberd (Def) $402,200
Stewart Crameri (Fwd) $359,200
Jake Carlisle (Def-Fwd) $337,000
Angus Monfries (Fwd) $325,500
Jake Melksham (Mid) $298,200