I got my MP60s on ebay for slightly less than half what they go for new at the stores, and when I got them I could hardly distinguish from new other than ball marks on the face that wiped right off. Along with the green residue from hitting off the mats at the range that also came off easily. I saw a set of Forged Nike Pro Combo Irons ($799 new) for $200 that had plenty of small dings and scrapes common with forged clubs, but nothing big. Although this set did have a miniscule amount of rust on the 7i.
I suggest you get the best used set you can afford, but I'd also say to stay away from the super-game-imporovement irons. Go for something in the middle. Big Berthas would be a good choice. fusion wide soles and slingshots not. IMHO anyway FWIW. I'm also a fan of the Cleveland CG4s and Mizuno MX17 and MX23s
Here's a set that ends in 12 hours you might be able to snag...
http://cgi.ebay.com/Mizuno-MX-17-Iro...QQcmdZViewItem
Also look at your local Roger Dunn golf store for used deals. The one near me has Ping Eye2s for 150. This was my first set of Irons years and years ago so they still hold a special place in my heart. I think I'll get this set just for the nostalgic appeal.
This is of course all my opinion only, but I think that if you get the clone set, you'll quickly outgrow it and realize you need something better. Thus turning them into an unsellable eyesore in your garage, forever reminding you of the $200 experiment. If you get the used calloways you can at least sell 6 months down the line for close to what you paid when you outgrow them as well..
As you get better and your swing becomes moreconsistent you'll gradually tend to gravitate more to a set of forged irons