I bought a brand new SX2 last year for $500. Gun shop had two that had been marked down many times over the years to half price. One had a 26" bbl, the other a 28in. I grabbed the 26" bbl gun. Shoots very well and patterns great with a JH670 and various turkey loads. That said, mine was black, so I'd have been willing to pay extra for camo. A camo SX2 with few shots in like new condition is well worth $500. I'd buy it.
If it doesn't pattern turkey loads to your satisfaction, you can easily get your money back from someone looking for a good duck gun. I don't feel you'll have any issues as every INV+ gun I've patterned shot well.
