That is why when I buy pc products in SLS, buy already, don't go and compare the prices. Do your prices comparison before buying.
The truth always hurt.
I always thought well known brands like Microsoft and Logitech products prices are pretty much the same throughout shops but I was wrong.
went to search for a wireless mouse last week. The model - a white laser bluetooth Logitech mouse. Most shops selling at $90, some at $80+, a few at $75 and one shop sell at $69 - the cheapest.