Rapha, nice but a bit pricey?

Would you have the cheek to walk back in to your LBS a week after purchasing something and say "I bought this last week and am perfectly happy with it but notice this week you're selling it for a bit less, can I have the difference back?" Would you fuck, it'd be far too embarrassing.

I've done this with (obviously unworn) clothes lots of times (mostly pre / post christmas time) - why wouldn't you?