A good sword could be passed down from father to son, or gifted to someone in exchange for favours, or buried with a notable warrior. Many Viking weapons did double duty as humble farm implements, sailing tack etc and thus were recycled rather than inherited. The Vikings did not have particularly high-tech/super-efficient weaponry that would have represented a major investment and frequently lost, abandoned, or cannibalised their own kit. They failed abysmally as archers for example, though they tried it.