I have a German made one. It's a custom shop Euroburst model, and it was one of the pricey ones. It's got more of that sturdy, handcrafted feel and great attention to fit, finish, and detail as one might hope and expect for the price. It's A+++ in every way. My particular one has more sustain and even-ness all across the fingerboard than any other German Hoffy I've ever owned. The price made me have heart arrhythmia but I'm glad I did it because I love it and it's a very unique example.
I also once held/played one of the $300ish ones briefly-didn't own it though. I considered buying it just to dick around with it, maybe rip the frets out, something like that, but I passed. Overall, the cheap model looked, felt, and sounded exactly like garbage. Some of the components on the one I played felt flimsy and cheap as well. Your mileage may vary of course, and those can do the trick if you tweak them right.
I haven't played the middle of the road $800 one, but my understanding is that they are Asian made, but have German pickups (and maybe other components as well?), and I think they have a center block, making them a semi-hollow instead of the hollow bodied German ones. Again, I've never played one but I have always heard great reviews.
As far as justifying the wild price differences, well that's too subjective. My advice would be to spend sub two grand on a used German v63 model. They're often nearly as nice as the Euroburst I have now, and you're still getting the "real" thing.
I hope my babbling is somewhat useful.
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