RDC is definitely reputable. I have purchased some of my favorite bags from them. I've been lucky when obsessively hunting bags on eBay and got lower prices but I absolutely don't regret paying more for the rare and amazing bags I was able to purchase from RDC. I got some very rare bags that I don't think I would have ever found elsewhere....04 grey ph city, 04 grey ph purse (have never seen that show up anywhere), 04 mystery green ph city, 03 dark caramel ph city...all pretty hard to find elsewhere. Also got 05 turquoise city, 04 rose city, 04 eggplant clutch and a sublime 04 black ph City.
So I can vouch for the great quality of the bags they sell.