Brighton have agreed to sell defender Danny Cullip to Championship rivals Sheffield United for £250,000.
Cullip has made more than 200 league appearances for Brighton
The 28-year-old rejected the offer of a new contract at the Withdean Stadium and is set to join the Blades in a deal that could end up worth £400,000.
"Once it became clear Danny wanted to go I had to get the best price for him," said Albion chairman Dick Knight.
"At United he will be playing in front of 20,000 people every week and has a chance of playing in the Premiership."