In Germany and the Nordics berg is mountain if I am not mistaking and someone with a lot of muscles in the Nordics would be called ”muscle berg” (local wording in Swedish: Muskelberg).
Also StrongBerg recently sold for 500+$ on GoDaddy according to Namebio (a few Berg suffix sales there in the past years showing there is some interest at least)
Accept offers while you hold it and sell if you get something. My guess is that you should be happy with low $$$ - mid- $$$ but with the right buyer (as always) you may get more.