I having been trying to haggle and even walked away. Told them my price. They didn't even move a little.
Aa for HID. Recent kwilfit mot I went for for one of my old car with HID from factory, they made sure the washer jet works. I was observing all the time. So testers who know will know what to look for and retrofit ha's to be the full package.
Also, personally I say the full option car are worth every penny. Else you Will regret it, at some point.