1) Deliver too many pitches 2) Describe too glowingly 3) Exaggerate the merits of 4) Hawk aggressively 5) Hype too much 6) Make exaggerated claims 7) Pitch to excess 8) Present too aggressively 9) Promise too much Found on https://www.crosswordclues.com/clue/oversell
O`ver·sell` transitive verb [ imperfect & past participle Oversold ; present participle & verbal noun Overselling . ] 1. To sell for a higher price than; to exceed in selling price. « One whose beauty Would oversell... Found on http://www.encyclo.co.uk/webster/O/56