Insurance isn't $2-$3 a day, it's a little more. Caveat emptor
Collision Damage Waiver (CDW).
Sometimes called a Loss Damage Waiver (LDW), this coverage relieves you of financial responsibility if your rental car is damaged or stolen. The CDW may be void, however, if you cause an accident by speeding, driving on unpaved roads or driving while intoxicated. This coverage generally costs between $9 and $19 a day. If you have comprehensive and collision on your own car, you may not need to purchase this coverage.
Liability Insurance.
This provides excess liability coverage of up to $1 million for the time you rent a car. Rental companies are required by law to provide the minimum level of liability insurance required by your state. Generally, this does not offer enough protection in a serious accident. If you have adequate liability coverage on your car or an umbrella policy on your home/auto, you may consider forgoing this additional insurance. It generally costs about $7 to $9 a day. If you don't own a car, and rent cars often, consider purchasing a non-owner liability policy. This costs approximately $200 - $300 per year. Frequent car renters sometimes find this more cost-effective than constantly paying for the extra liability coverage.
Personal Accident Insurance.
This provides coverage to you and your passengers for medical/ambulance bills. This type of insurance, usually costs about $3 per day, but may be unnecessary if you are covered by health insurance or have adequate medical coverage under your auto policy.
Personal Effects Coverage.
This provides coverage for the theft of personal items in your car. However, if you have homeowners or renters insurance, you may be covered for items stolen from the car, minus your deductible. You need to have receipts or other proof of ownership. This type of insurance usually costs about $1.25 per day.