I would say a scam, I mean £190 for a star wars UCS set is too good to be true, and i don't think it is the ship, maybe only the minifigures. So if you want to buy 10179, then i would say get one a bit more expensive to guarantee the complete set, and not being ripped off.
You can never be too careful on eBay and Amazon. Oh do you think 7283 from eBay at £60 a good deal, i mean all it is missing is the instructions, which i can find off the internet, and the guy has 100% feedback, should it be trusted though