Not sure exactly what you mean, but we dont have to sell Delap, and we dont have to sell to Southampton either.
Clubs dont always like loaning players for a season because clubs can end up prefering to play someone they own instead. Selling with a buyback option means basically:
- if he does amazingly, then City buy him back and in effect its just a longer loan that Southampton benefit from in 2 ways. Firstly the profit and secondly his great performances while there for 1 or 2 seasons.
- if he does pretty well, City maybe wouldnt buy him back, then he carries on in Southampton's team as their player. If he then improves maybe they sell him on elsewhere for profit. He may even become great and City not enforce the buyback, because teams sometimes make mistakes.
- if he does rubbish he's theirs, maybe they sell him at a loss.
If City rate him enough to demand a buyback clause, then Southampton have to put up with one and cope. If they cant work that way, then there would be no deal. End of. We'd then be looking at a deal with a club willing to accept a buyback clause being included.
That said, by all accounts Bazunu and Lavia both have them, so no reason to think we couldnt agree one with Southampton for Delap too. Might just need to be a bit of haggling over what that price is and how long the clause is active for.