Re: They're still at it!
"It meant a retailer could claim you won't find this model cheaper elsewhere"
I discovered this in the mid 80s when fridge shopping. Each major retailer had their own flavour of a particular fridge, and there were slight differences in the layout of shelves and compartments.
Forever after, I've been highly cynical about offers of "Find another outlet that's cheaper and we'll refund the difference"
What I ended up doing was finding an privately owned shop and spoke to the owner, who was more than happy to beat the prices of the main contenders.