Old equipment (A B and C-grade)

What is the best way to get some of the older equipment sets (such as Blue Wolf B-Grade sets or Divine C-Grade Set)?


I'm a returning player, and partly I want to get those old sets that I used to wish I had. I spent awhile looking today, but it looks like unless it's gear offered by the "Steel Door Guild Coin" or as equipment you can purchase with seals, the only way to get the items would be to craft them yourself.

Is there any other way?