"
Anorak (Ipswich): There is a sell on clause in Roberts contract that will see Accrington Stanley receive 50% of any fee that Town receive should he be sold at a later date. Accrington will also receive extra money should Town gain promotion. Town paid an initial £50,000 to take Roberts on loan back in October, and paid around £200,000 to secure his services permanently this week. (2007-01-04)"
Pride of Anglia - Ipswich Town Football Club
"Gary Roberts has completed his move to Ipswich Town for an undisclosed fee, however, Accrington Stanley have confirmed they have a sell on clause and the fee will increase should Ipswich win promotion."
BBC - Lancashire - Sport - Transfer news
The first source suggests that the sell-on clause of 50% of
any fee if he were sold, not the additional fee ... so maybe there's hope for a windfall yet
