I hava a lightly used Sig Sauer Mod X-9 suppressor for sale that has had maybe 250 rounds through it.   There is no box for the suppressor but I do have the tools and all springs etc. it came with.  I sold the pistol I used this on and don't intend ot buy another one to use it with so I no longer need it.  I am looking to get half of what I paid for it new.  It was $995 new and I am looking to sell it for $500 cash.  I will need it to be paid for up front and have the Form 4 submitted by you and when it comes back approved, you can take possession or if you are an FFL and deal with used suppressors and would like to purchase this, you'll probably have different rules.  Below is the description from Sig for this suppressor.

The newest pistol suppressor line from SIG SAUER features completely modular and configurable titanium baffles for the ultimate, light-weight performance that allows the user to personalize their suppressor for overall length, weight, and sound. The MODX-9 provides class-leading sound performance and can be easily disassembled and reconfigured with fewer baffles when your priority is size over sound. The MODX suppressors feature 21 points of impact adjustment and come with a fixed barrel spacer for carbine use. Each MODX suppressor includes the most popular metric and metric piston for its given caliber.
  • User Configurable Modular Baffel Design
  • Titanium Construction
  • Includes 1/2x28 and M13.5x1LH Pistons
  • Includes Fixed Barrel Spacer For Use With Carbines
  • 21 Points of Impact Adjustment
  • Unique Exterior Design Doubles as Wrench Flats