I found a sweet deal at GC for a used Ampeg SVT-410HLF. I'm definitely going to buy it.
But I've always had this persistent fear, every time I have bought a used cab: I'm afraid the previous owner replaced one or more of the original drivers with drivers of lesser quality.
I know it's probably irrational, but it still makes me uneasy. I know once I've gotten it I can open it up and look at the speakers for verification, but I still wonder: has this ever happened to any of you?