You´ll notice the item is just 35 cents, but the shipping is $3.75. This is because the item is a simple resistor that you can buy for the same 35 cents (or so) that simply advances your timing. He stuffs the resistor in an envelope with a 37-cent stamp and off it goes. He invests less than a buck and gets FOUR bucks back. 400% profit selling useless junk to suckers.