What were the original MSRP prices for a new 2006 M35

Here's an excellent site that lists MSRP and option prices and dealer invoice. You basically build the vehicle you are looking at and it will spit back a price: http://www.internetautoguide.com/car-pricing/99-int/2006/infiniti/m35/awd-sedan/306/index.html You can expect to see the following overall pricing: MSRP $40840 - $43640 Invoice: $37538 - $40105

I have a 2006 M35x With Echnology Package and DVD that was just over $50,000 brand new.

Technology

If you change out the motor to a brand new one and transmission and redo the interior and custom rims, so what will be the value on a 2006.