£50 million is a hell of a lot of money but there's an interesting theory doing the rounds in relation to why the fee for the 21-year-old is so high.
Watford were initially reluctant to sell Richarlison to Everton after being left frustrated by how the Toffees pursued their former manager Marco Silva last season.
Richarlison enjoyed a stunning start to life at Watford, as he terrorised defenders throughout the opening half of the campaign, but tailed off in the New Year following a lack of confidence, with his last goal dating back to October.
Richarlison joined Watford from Fluminense for £13m last August and impressed in his debut Premier League season, scoring five goals in his first 12 appearances.
Everton and Watford have had a somewhat testing relationship, with the Merseyside outfit seeing an initial approach for Silva rebuffed after they sacked Ronald Koeman in October previous year.
Everton named Sam Allardyce as Koeman's successor, and after he was then sacked at the end of the season, Silva was appointed on May 31. The fee - reported to be in the region of £50m - would see Richarlison become Everton's club-record signing, overtaking the £45m they paid for Gylfi Sigurdsson last summer.
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