You could do it overnight but the cost would make it very non-economical for the amount one would purchase.
For anyone seriously considering purchasing discus just shoot me a PM and I'll set you up with the contact info of 2-3 separate guys that are highly regarded in the discus community for having excellent stock at reasonable prices. They each have lots of feedback and are extremely nice people and would be willing to work with you and find you exactly what you are looking for.
I'd really be wary of the OP. He posted an ad in the classifieds several days ago for "free discus" and all you have to do is "pay shipping". The fish that he posted pictures of in this thread are worth at least $50 each, some of them much more, so you have to ask yourself why somoene would be giving away hundreds/thousands of dollars of fish for the cost of shipping. Granted, I could see if it was to his friends, but he just joined the forum so why the kind act to someone he doesn't know? Maybe because he wants you to "pay for shipping" and have you trust him. See how many fish you actually receive in the mail if you pay him over $100 to ship the fish. Just don't post a thread on here or elsewhere saying that you were scammed because there are many warning signs evident.