Swansea fullback Davies: £10M right price for Williams
Arsenal are refusing to meet Swansea's valuation of Williams.
Davies, who flourished playing alongside his international skipper last season, believes the required fee should come as little surprise.
He said: "Last season I would say Ash was one of the best centre-halves in the Premier League, I cannot think of many who were better than him. The job he did was incredible.
"A price of £10million or more to sign him is completely justified.
"You see some of the money that gets spent in this league on players who are unproven in the Premier League. I think £10million is more than a fair price."