It was on offer at a discount store, worked out about 50p a tin.
These are not poor people. One of their biggest concerns is inheritance tax (I say fgs spend it!)
They don't even like tuna much, but have been back for another 48 tins.
This absolutely will not be wasted. They will plough their way through 96 tins of tuna that they don't enjoy, just to be thrifty, which they don't need to be.
They've always been ones for stocking up when the price is good - in then70s they would buy a whole cow from the butcher for the freezer, but surely this is ridiculous?
What's more, I mentioned that we actually get through quite a bit of tinned tuna because it's about the only thing DS2 likes in a sandwich and they didn't even offer me a pallet 
Do you have examples of extreme and unnecessary thrift? I like a bargain, I'd stock up if it was something I enjoyed, but when you don't?