West Brom are demanding £20m to sell Sam Johnstone this summer.
The relegated Baggies are aware their sought after goalkeeper is keen to remain in the Premier League, and his contract expires at the end of next season so he could leave on a free transfer in 12 months.
However, according to The Sun their high valuation is proving to be a problem for West Ham and Manchester United who are both reportedly interested in securing his services.
It is believed United would move for their former keeper if Dean Henderson or David de Gea were to leave this summer, but they would not be prepared to meet West Brom's valuation.
West Ham also want to sign Johnstone but David Moyes is prepared to wait for his price to drop.
Moyes sees the Baggies stopper as the long-term replacement for 36-year-old Lukasz Fabianski.
