Lets say you have a C20 pen offhand, that adds 1.2b, which last I checked is 6.5b not 7b.  I highly doubt you have a C20 pen offhand, considering there is only 1 guy in all of BDO to have full C20 Pen and he's in Korea.

Before you say something stupid, and claim that you are C20 Kzarka, C20 Dande, and C20 offhand, realize that I already did the math there, and that is only 4,730,682,000 silver, which is cheaper than 2x Pen blackstar + C20 offhand.  Also before you say something stupid, remember that armors cost nothing even the caphras in armors don't cost anything to tag, nor does the Vell's heart, Riding crop (that you will no doubt try next), the Cups added to your accessories, or anothing else you can come up with.

Wait wait wait, I might be off by a few silver, because I forgot about Crystals, so that's an extra 30m if you have 1b worth of crystals in your main hand, Awakening, and Offhand.

Like I said dude, there is no need to lie about your gear to try and impress people.  If you were just exaggerating about the 7b, okay you could say that.  BUt no you got caught in a lie and now you are digging the hole deeper.  Would you like a backhoe to dig with, it might go quicker.

I use the tag system for when I want to grind on another class and change things up for it.

The only downside was because of imperial trade restrictions. I made the mistake of tagging my chef; if I wanted to keep the tagged character+gear, I had to spend money to move lifeskills around. So it was either retag and delete current tagged gear, or spend money.

Ultimately the money spent was a better choice and made lifeskill stuff more efficient, but still..

Restictions to imperial are kind of garbage imo. I get the reason behind the trade restrictions when it comes to crates and trade goods in general, but imperial? Even fishing goods is kind of questionable imo. You're not really getting around anything with fishing by tagging to someone else and moving. The fish time degrades regardless of if you're on the character or not, plus the chances someone would even be able to take advantage of the fact that you're manually transporting fish to trade for silver is so low that it shouldn't even matter. That point goes for imperial trade too. You already can't put imperial boxes on horses, and I believe that if someone dies with imperial boxes, they don't drop or get deleted like fish. So what's the point beyond being an inconvience?

Normal trading I fully understand though. Just some of the restrictions I don't understand and think may have been an oversight. Could be wrong, might not be seeing the full picture, so someone correct me if I'm wrong here.