St Kilda and Fremantle have reached a stalemate trying to negotiate a move for Brad Hill.

The Dockers are asking for St Kilda's 2020 first-round selection as well as this year's pick six, according to AFL.com.au.

Saints football boss Simon Lethlean has already hinted that St Kilda want to use that selection to pull in Ben King from Gold Coast.

Hill's career-best year along with having two years left on his five-year contract has prompted plenty of discussion between the clubs about whether he's worth their top-10 selection.

St Kilda suggested 'splitting' that pick to have dual first-round choices but Fremantle is set on No.6 if Hill is on the move.

Dockers football boss Peter Bell suggested that there would be serious negotiations between the clubs when he spoke on the opening day of the trade period.

"We've had numerous discussions – myself and our list management – with their list management," Bell said on Monday.

"Brad's an exceptional player, clearly, and they've made a really strong offer to him and they've made that in the knowledge he has two years to run on his existing contract with us.

"He's athletically as gifted a player as you're going to find in the AFL and does things not many other players can do, so we'll work through that with the Saints."

Hill had an average of 25.1 disposals, almost 500 metres gained and six score involvements culminating in finishing third in Fremantle's best and fairest behind All Australians Nat Fyfe and Michael Walters.