I haven't played this game in a few years.

Now I have anniversary gifts 2-3-4-5-6 on my presearing toon.

Should I just open them?

Years 1-5 are pretty much worthless these days, the greens have a small value but not much.

Year 6 has a few green rarity tonics that are worth a reasonable amount still, but I never see anyone buying the unopened's so just hope to pull one of them I guess.

Year 7 are the only ones you'll occasionally see being traded unopened, for something like 10-15e.

Ok thanks, one last question.. Are the presents one per account or every character that has one can open it respectively.

I have a few characters and they all have the presents..

And I do have 7year too I just noticed.

One per year per character