the coins one is good. there was a Henry 5 coin on the bay with the description 'looks old' went for 300odd quid despite the guy who struck it, not two years earlier, contacting the seller,. So someone got ripped off, as Dave used to sell them at a pound.They don't though, that's people taking the p*ss like those "rare miss print coin!!" listings that are normal coins with nothing wrong.
They're listed at those silly prices but if you view actually sold items they go for ~£50-60 at best with most sitting around £30.