Testing the waters: How much is my '11 X5 35d worth?

[Crash513]

Hi all. I've finally found a deal on a worthy replacement for my 2011 X5 35d. I'm considering selling the car private party vs. trading it, and I'm trying to get an idea what I can get for it.

This was a BMW executive car that I bought in early 2011 with 13k Miles on the clock. It now has a little over 80k. I had the ultimate service on it, so all service and repairs except tires were done by my local BMW dealership.

The car is in good condition by KBB standards. Everything works and it needs nothing mechanically or cosmetically. I just had the intake manifold de-carbonized when I had a faulty injector replaced. I also just put on a new set of Continental ExtremeContact™ DWS06's installed.

I am not looking for offers here, but really just asking for a collective view of what I should be asking for my SAV. Any inputs are much appreciated.

Original MSRP = $74,525
KBB Private Party range = $18.6 - 21k

Original window sticker information below:
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2011 xDrive35d 4dr SUV
VIN: 5UXZW0C59BL368545
MSRP
Base Price $51,800

Alpine White $0

Nevada Leather (Includes Nevada leather seats)$0

Dark Bamboo Wood Trim (Includes Dark Bamboo interior wood trim on
the dashboard, doors and center console)$0

Sport Activity Package (Includes Sports suspension delete, 3-spoke leather wrapped sport steering wheel, 19" Y-spoke alloy wheels (style 335), Sport seats, Shadowline exterior trim, and Anthracite headliner) $2,200

Cold Weather Package (Includes heated steering wheel, 3-stage heated front seats, and high-pressure spray headlight cleaning system)$900

Premium Package (Includes Power adjustable steering column, Power tailgate, Universal garage door opener, Auto-dimming mirrors, Auto-dimming rearview mirror, Lumbar support, Storage package, Digital compass mirror, Ambiance lighting, BMW Assist with Bluetooth, and Nevada Leather) $3,400

Premium Sound Package (Includes Satellite radio with 1-year subscription, Premium hi-fi system, and iPod and USB adapter) $1,800

Rear Climate Package (Includes Rear manual side window shades, 4-zone climate control, and Privacy glass)$900

Technology Package (Includes rear view camera with Top View feature, Park Distance Control, Navigation system with online information services, voice command and Real Time Traffic information) $2,800

Adaptive Drive (Includes Active roll stabilization active stabilizer bars, electronic damping control variable rate electromagnetic shock absorbers) $3,500

Multi-Contour Seats - Requires (ZAP) Sport Activity Package ( Includes 20-way power front seats (16 seat positions plus 4-way power lumbar support)$900

Comfort Access Keyless Entry (Includes Comfort Access remote. Comfort Access allows the user to unlock and enter the car and start/stop the engine without using the key or keyfob remote) $1,000

Running Boards$300

Roof Rails $100

3rd Row Seat (Includes 2-passenger, third row seating with independent climate control vents, second row manual fore-aft and backrest adjustments, 2 third row cupholders, and self-leveling rear suspension)$1,700

Automatic High Beams$250

Heated Rear Seats (Includes 3-stage heating for front seats)$350

Lane Departure Warning$950

Heads Up Display$1,300

Destination Fee$875

Total$75,025