Need repair cost advice
 

Recently had my 2000 ES 300 in a private garage to evaluate the check engine light & trac off light staying on at the same time.
Diagnostics showed codes PO440, PO441 & PO446, Vapor Canister Solenoid & Vapor Control Valve respectfully......
Garage stated $750 for repairs......I am not by any means a technoid, but don't also know if this cost is realistic. Appreciate any help or advice.