Saints are believed to want around £150,000 for the ex-Bolton, Dundee United and Motherwell striker but the Coca-Cola Championship side offered significantly below that figure when they approached the Perth club on Tuesday.
Duff said: "Their chairman phoned mid-morning to ask for permission to speak to Owen but we felt it more appropriate to agree compensation between the clubs first, rather than allow the manager to go down, possibly agree terms and then find we couldn´t agree with Burnley."
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