RBL are pushing to bring the striker back to Germany this month after a successful six-month loan in Leipzig last season.
BILD says RBL have offered €20m – and won’t go higher. However, Everton are refusing to budge from their €30m valuation.
RBL chief Ralf Rangnick remains confident Everton will cave under pressure from Lookman’s representatives.
With Richarlison and Bernard arriving this summer, Lookman’s playing chances under Everton boss Marco Silva are now slim.