Winchester 12 gauge rifled slug barrel

Winchester sxp 12 gauge 22" fully rifled slug barrel with iron sights. Shows as new not a mark on it only put one box of 5 shots through it and cleaned afterwards.  Fits sxp field models or 1300 will not fit defender models possibly with a adapter. Comes with 2 boxes of shells worth 40 each and I paid 575.00 for the barrel in August 500.00 firm or possible trade