What options are there for old soulbound gear in GW2?

Solution 1:

You can do a nice gamble by putting it in the Mystic Forge in order to try and get a precursor weapon:

Have look here under the head "Acquisition": http://wiki.guildwars2.com/wiki/Precursor_weapon

Combining four rare or exotic pieces of equipment with an average level of 75 or higher, e.g. one L60 weapon + three L80 weapons or three L75 pieces of armor and a L75 weapon

Solution 2:

Your options are:

  1. Sell it the a merchant
  2. Salvage it
  3. Throw it into the Mystic Forge with 3 similar items

But note that you won't be able to sell or salvage any gear that was acquired from a karma merchant or the helms that are rewarded for dungeons' story mode. Salvaging is often your best option for level 68+ rare or exotic gear, for the chance to obtain ecto, otherwise selling to a merchant is likely your most profitable option.