Depends on where in West Coast. In SoCal, non-eventing barns, you may get a little bit of snobbery around Draft x TB (A cross that I have absolutely enjoyed, but I grew up riding on the East Coast with hunts where this was far more common).
Many eq people down in LA/SD have $$$ and wouldn’t want anything not WB. I say this is a golden ticket for many, despite them not realizing it. To the right buyer, as others have said $20-$30k - higher if he’s 16 and not coming 17, and higher yet if he doesn’t ‘look drafty’. A jumper adult ammy who isn’t unnecessarily snobby about breeds would love him!
PNW/ Central CA & with eventers (if he can do dressage) will maybe give him more credit where credit is due, and the price to match.