Odd DAC Pricing

I’m in the market for a Mola Mola Tambaqui and I’ve noticed that many listed for sale are of recent manufacture and only owned by the seller for a few months, yet they are reselling many thousands below retail. How can it be that an item that retails for $13,500 is so often resold only months later for $4000- $5000 off.  Sometimes the reseller is already the second owner in just 6-9 months.  Is there something I don’t know?  Some gray market? If you know something about how these are purchased that you can’t share publicly please DM me.  Thanks for any information.