This is common supermarket practice in the UK, they buy product in and put it on sale at a high price and then after 30 days they're allowed to slap sale signs

This is common supermarket practice in the UK, they buy product in and put it on sale at a high price and then after 30 days they're allowed to slap sale signs around them. It's most obvious with wine (the amount of £5 reduced from £10 bottles which are clearly not worth £10 is astonishing).