If you query the seller they will say it is a mistake and only sell at the higher price.
Selling on line is usually cheaper than In store - even from the same retailer.
It not unusual to find in large retailer
the same. usually small item - at various points around the store at differing prices.
Don't know why this is- one could guess new stock it put out at an 'upped' price whilst older stock languishes at previous[lower] price.
I found this once in PCW with USB Memory stick- same type.brand in two locations and two prices