The 26-year-old has been a sensation since he joined United from Ghanaian side Legon Cities.
The Ghana number one shot-stopper has emerged as a target for South African giants Orlando Pirates and Mamelodi Sundowns alongside a host of French clubs.
He was in top shape as United recorded a 2-1 win over Kaizer Chiefs at the FNB Stadium at the weekend.
And the club's gaffer Eric Tinkler says the Ghanaian won't come cheap.
"If someone wants him, it's going to be a lot of money... that I can tell, because of the qualities that he has," Tinkler said of Ofori.
"Richard is a quality goalkeeper, there's always gonna be interest in him, but he's a good professional, modern professional... he works extremely hard. There are aspects of his game I still feel he must improve on, but he remains our No1 goalkeeper and our captain."