My worst shopping experience was about 10 years ago, buying an Intan with Bits and Bobs dances from the well known reseller from their store. If I recall correctly I either received an empty Intan or nothing at all. I contacted their support staff who told me the owner had vanished, they hadn't been paid either. The Intan creators store has a sign up saying they were aware of the problem and had raised it with Linden Lab. I contacted Linden Lab myself and they said it is a resident to resident dispute. The store remained open for about a year essentially selling empty boxes before it went, presumably their account was then empty and insufficient to pay the tier collected from customers who had been ripped off like I had.
It was an expensive lesson in purchasing in an economy with no consumer protection, a bit of a shock to be honest that Linden lab operate and profit like this.