Yes, it seems square/rectangular bars stack well and take up the least space, @cryptictruth. There is a lot to say about eye-appeal, when it comes to Silver, Coins, Bars, etc... And their artistic value. My Local Coin Shop, Dealer, is only selling, his new, modern bars. Hoarding, unknown bars, until he has an idea of what he has. Some of these bars, with a simple design & numbers, can be over a hundred years old. It seems there is rising interest, in old, vintage bars, their rarity, defunct companies, low mintage numbers, data, with unknown values. But, some say, it's all about the weight, of the Silver. I try to stay as close, to the spot price, as possible. It is hard to avoid, paying a premium, over the intrinsic value, of any Silver. And even harder to get a premium back, from the dealer.