Used to work in Index a few years ago. I'd say around 50% of the Vivitar cameras we sold were returned either broken or because the buyer found out they were pants.
Mrs Secure has one & I got Will one from Superdrug recently: a good price I'll admit, at £15 for a 3mp cam, but as I say, a bit plasticky. I noticed Superdrug had a Vivitar 5mp in the window today for £40.