Quintuple Your Savings: Salvage Value

In a previous post, I mentioned that there are 4 discounts available as reproduced below.
I would add one more to the available discounts i.e. Salvage Value.
This way a person can Quintuple her Savings.

The minimum/maximum dealer would give for your old car would be $150 which is value for cars steel, aluminum etc. which is the raw metal cost.

However, suppose you have brand new tires. You can sell the new tires on Craigslist and put on old tires when you give the car to the dealer.
Similarly for Infiniti, there is Bose sound system with expensive speakers. Those can be sold before giving the car to the dealer.
Alloy wheels, security system, etc. are some other things that can be sold before car is scrapped.
Total Salvage value of Car Parts $500-$1000.

1. Get $4500 by buying a Car that gets more than 28 MPG
My research says best cars in that space are:

(a) Toyota Prius
(b) Toyota Corolla
(c) Nissan Altima

2. Get Tax Credit for Buying a Hybrid:
http://www.fueleconomy.gov/feg/tax_hybrid.shtml

Nissan Altima has $2350 tax credit
Toyota Prius does not have this, it seems as it has already sold 60K plus vehicles

3. Get Sales Tax Credit for Buying a Car this year:
http://www.irs.gov/newsroom/article/0,,id%3D205863,00.html

4. Get the Discounts offered by Car Manufacturer i.e. Nissan (upto $3250 off)
http://local.nissanusa.com/west/altima.html