IMO buyer's remorse happens easily with MK because there are so many lovely styles and colours to choose from! You never know if your perfect combination of colour, style and the right hardware is just about to be released! Also because of the cost I suspect we want to make sure we're making the right investment?
I've been very indecisive about 2 out of 3 of my MK bags. Poor DH spent at least an hour in Starbucks opposite the MK Berlin store while I ummed and ahhhed about what to get. Thankfully he's a patient kind of guy and I don't drag him out shopping at home!