This template gives you everything you need for a professional, customizable and legally binding Bill Of Sale Delaware.
Not required by law for most items. But recommended for cars, boats, expensive equipment. Proves you bought it legitimately if anyone asks.
DMV needs proof you bought the car before they'll register it in your name. Bill of Sale shows the transaction happened and when.
No general sales tax, but there might be other fees. Bill of Sale still matters for proving you own something and what you paid for it.