I remember hearing Venom's first album, and going to see them just after they'd released Black Metal. They were (unsurprisingly for a band whose publicity shots showed them looking exceptionally unscary on Whitley Bay beach) more than a bit crap but hey, they came from my home town. I saw them a couple of times and they never got any better.
Imagine my surprise to find that they're still going. Presumably no better than they ever were, and after a million lineup changes, but they're still earning a crust on the nostalgia death-black-stanic metal circuit.
I was gobsmacked to see that a band of such extraordinarily limited talent continue to make a living out of music. I'd have bet good money that they'd be the very last people to do this.
So who else are you surprised is still going?