Hah I like how their minimum order is 1 lol.
I've had several of these over the years and they are indeed cost prohibitive. Most of the ones I've owned I've simply sent to the big ol scrap heap in the sky...er, the furnace.
Usually the weight is an odd amount...993.8 oz or something similiar. They're easier to buy and sell than their smaller brethren in some ways. People who own 10 oz bars are quite proud of them and enjoy showing them off to friends, etc...but people who own 1k oz bars hate them because they are hard to lift/move, weighing in at about 70 pounds. Also, when you tell someone their bar is worth $6500.00 they're usually faster to take the money than if they had a $65.00 bar.
I've only bought these from two types of people...folks who got them through an inheritance and others who purchased silver options and elected to actually take delivery of the silver, for whatever reason.
Nick