(your link is broken)
I really wouldn't bother with that sword. I even found one for sale later in Freedom Isles and didn't bother buying it.
Runes and Crystals are really valuable, don't trade them for an average weapon (you'll very likely find better weapons before you leave the first continent).
If the undead are bothering you do the swamp last, or even visit the Freedom Isles and come back at a later level.
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Harley-Davidson FXSTD