Seems like a seller is lucky to get any worthwhile responses on CL these days. It's mainly scams and bots. Bottom feeding, low-ballers are the norm on CL, gotta expect it.
Friends tell me that folks are going over to other online sales sites, like Facebook marketplace, OfferUp, LetGo, especially now that CL has started charging for certain ads.
For a valuable, late model rig like you are selling, I personally would would want to be on Ebay and Cycle Trader and if I placed a CL ad at all, It would only be to point people to my Ebay or Cycle Trader ad, and I wouldn't give my phone number in the CL ad.
If it was me, I'd also avoid including any and all language rationalizing and defending my price, on the premise that if I acknowledge ANY argument about the pricing, it just opens the floor for discussion. If folks are in the market, they already know what your rig is worth. If they aren't knowledgable, ... you've already done the research and there's the price. In my opinion, being argumentative, (Like, for example, the title you used on this post) just invites negative attention.
When I'm selling, I don't argue and I don't explain, I apologize, and say "If it was up to ME, I would definitely take your offer, but my wife won't let me take less". ( and I'm single)