I tried a kind of wine on the suggestion from a book - and it was horrible - more later...
But first, as for the port... Don't know what you ended up buying, but an aged, Portugese, port is definitely worth it, both red or white - not so sweet either. In my experience, a sweet port is "cheap" - a decent port would cost at least close to the equivalent of 20 USD a bottle in Denmark, or better 30 USD, but I suspect a good deal less for you
A good quality mead should be about the same. Real mead is honey wine, but I have seen a lot that have been fortified with stronger liquors, especially brandy - not bad either.
As for that horrible wine that was suggested by a book: I read about priest in the middle ages who LOVED a white wine he was served when travelling on the road in Italy. He exclaimed "Est, est, est!" - and that became the name of the wine. I came a across a wine in the supermarket called that shortly after. I couldn't not buy of course! I have not tasted anything as sickeningly sweet - enough to make your teeth sing. Eeew! Just horrible. I have tasted meads that were flat, ports that were sweet, whisky's that were boring and snaps that were too benign - but nothing as bad as this wine. Not even the worst Liebfraumilch.