The Lodge pre-seasoned is, to put it gently, junk. My old pans have a smooth, machined finish for the cooking surface, while the outer surfaces have the rough sand-cast finish. I don't care how well seasoned it is -- and Lodge's seems pretty perfunctory -- the cast surface is just not as smooth.
Enameled cast iron, on the other hand (you were probably looking at Le Creuset) isn't non-stick at all, and doesn't claim to be. But it's durable and cleans up well.
At second-hand stores, there's usually someone who knows what cast iron is worth. And it only takes one person to teach all the others and set the prices accordingly. Your best deals are likely to come from garage sales and estate sales, where someone who doesn't cook is unloading the dear-departed's stuff.