While i agree with you that he should have sold it, I dont think the length of this particular domain has any bearing on the value.
Like other "media" domains, this is just as short, its only 10 characters, and for a domain name with media in it, thats really not that long. If it were longer than what it is say 20 characters or 15, than i would think length would play a factor.
Its pretty memorable, and has decent marketability, but yeah goofus should have sold it.
PS its shorter than your domains
