Keep seeing threads like this pop up. I guess since this is an Apple forum its to be expected. There are always massively varying prices between companies, countries, new, used, trade ins, etc etc... due to currency exchange and a wide variety of reasons.
Playstation 4 Pro (a new product) from Gamestop in the US is $250 with trade in....
I think the problem with Apple is the mini is not a new product nor was there any price creep to slowly get to where they thought it should be. Just over night...boom, new higher price.