NOT LEGAL ADVICE HERE BUT...
A TM does not prevent you from selling. It protects the mark... the name. Coca-Cola. I can sell Coca-Cola. I can use that name when I sell it, because that's what it is. Coca-Cola. If I make a hot sauce with Coca-Cola, I could
not use that as part of the name of the sauce (w/o proper licensing), and in the ingredients, I would just list cola. So take heed when using these peppers
in your products. But understand what a TM is. It has nothing to do with distribution.
"Plant Variety Protection" is different. Example, Red Savina as seen here:
http://www.ars-grin.gov/cgi-bin/npgs/html/showpvp.pl?pvpno=9200255
The protection has expired but it was protected by the
Plant Variety Protection Office of the USDA. Not by TM. They put (tm) after Red Savina because you can put (tm) after anything you want to protect, it does not have to be registered, but when it is, you see (r), not (tm).
(r) Protects the name
Plant Variety Protection protects the plant variety with a PVPC (Plant Variety Protection Certificate). Like a patent for peppers.
Carolina Reaper is not listed.
There may be resell agreements in place when you purchase seeds, but this would be an agreement between you and the seller, and not anything to do with the government. So you could be in breach of your agreement with them. This is not because the name is a registered trademark, it is solely because of that agreement.
If anyone tries to sue you for selling the unadulterated seeds or pods because the name is a registered trademark there would be no case, because that's not what trademarks do.
AGAIN, NOT LEGAL ADVICE! ALWAYS GET YOUR LEGAL ADVICE FROM AN ATTORNEY.
Not taking any sides just speaking in general about TMs.