I did this successfully at a completely different store - a Media Markt in Berlin - using the approach: "Look, I want to buy this and I could order it online to

I did this successfully at a completely different store - a Media Markt in Berlin - using the approach: "Look, I want to buy this and I could order it online to this store, which would be silly: I have to wait, and you don't make a sale" in a slightly amused, non-confrontational tone. Now I don't think it is likely that the result depended on the approach, but inofficial store policy. Media Markt is expensive except for special offers. It was about two Logitech gamepads for ~15€ less overall.