Lens is mint, in like new condition.  No nicks or scratches.   Why pay full price for a new one?   
I used this once for Seafair Blue Angels shoot and it's been in the box ever since.   The lens is sharp and produced beautiful aviation pictures.   It's a wonderful lens for sports, aviation photography, birdwatching and wildlife.    It's a great compliment for Canon 7D Mark II, which I am selling as well.     You will be happy with this purchase.   It comes with all original accessories, manual, warranty card, caps, box etc.   

Description from the Manufacturer:

The Tamron SP 150-600mm F/5-6.3 Di VC USD is an excellent ultra-telephoto zoom lens, offering good image quality with smooth bokeh and sharpness, an effective built-in image stabilisation system which makes it possible to hand-hold and still get sharp results. The auto-focus system is fast, accurate and very quiet too, with a big focal range.
Expansive telephoto-zoom lens is well-suited to nature, wildlife, and sports photography and can be used on both full-frame and APS-C DSLR cameras.
eBAND and BBAR coatings have been applied to lens elements to minimize lens flare and ghosting in order to maintain high contrast, clarity and color fidelity.
VC image stabilization helps to reduce the appearance of camera shake to enable greater hand-held shooting capabilities in low-light conditions.
A USD autofocus system provides quick, quiet, responsive and accurate focusing performance that is suited to both still image and movie shooting.
A full-time manual focus mechanism allows for manual focusing at any time; even when working in AF shooting modes.
The optimized optical design reduces the movement of lens groups during focusing and zooming in order to maintain a compact and lightweight form-factor.
A redeveloped external finish, with linear patterned zoom and focus rings, enhance the overall handling of the lens as well as its cosmetic appearance.
A nine-blade circular diaphragm produces an aesthetic out-of-focus quality that is especially beneficial when working with selective focus or shallow depth of field techniques.


Specification
Lens construction: 20 elements in 13 groups (3 LD elements)
Angle of view:  diagonal
    16°25' - 4°8' (for full frame format)
10°38' - 2°40' (for APS-C format)
Focal length: 150mm to 600mm
Maximum aperture: f/5–6.3
Diaphragm blade number: 9
Minimum apertures: f/32-40
Minimum focus: 2.7m
Macro magnification ratio: 1:5
Filter size: 95mm
Weight:    1951g
Diameter x length: 105.6mm x 257.8mm
Supplied accessories: Lens hood, detachable tripod mount, manual