I've finally decided to pass on my 22 suppressor, originally purchased back in August 2013 (on ATF Form 4), and never got around to using it, so it's still in new condition.
Model is Guardian 22 micro with SS baffles, which appears to be discontinued now.
info here Huntertown Arms - Suppressors for everyone - warrantied beyond life

Asking $200, and all NFA rules apply and expecting buyer to be familiar with the process since I haven't purchased an NFA item in quite a few years, located in DFW. It'll take long enough to sell to a TX buyer, so keeping within the state.