If the auction said it includes the manuals, you need to ask the seller. Maybe they forgot to put them back in before shipping...Well, it was literally just the computer in the box. I was kinda disappointed. Oh well. The new RAM I bought also works in the Quadra.
I'll keep a lookout on eBay for an accessory box for a Quadra 605. The accessory boxes occasionally appear on there.
And if they don't have them, and won't refund you any money, you can give them a nasty ding for their lying.