We've got a catalog at work that has all sorts of audio equipment, home audio, car audio, dj equipment, professional recording equipment, etc. etc. etc. all cheaper than online prices, and there's no minimum order, but you have to provide them with a license, and i think proof of resale, so even if it was for yourself, you'd have to sell it to yourself and pay tax on it...
i think they even dropship, if you truly were trying to start somethin' up.