Is that more or less than the spot price? I would have assumed that they trade higher, though maybe the non collectibles trade are only a little bit higher.
My experience, I sometimes buy gold coins to make jewelry. I do that because at least here in Belgium, there's no VAT on coins but there is VAT on the other forms of gold that are more commonly used for that. For professionals it's not a problem because they pass VAT but for an individual it's a 20% difference. Also I'm in Antwerp so it's really easy to just bike to a place that sells gold if I want to.
In my case I buy old French 20 francs coins as they are quite "cheap": 1% above spot price of their gold content (they are 90% gold).
Other more recent coins, like Chinese or Canadian ones, sell at a much higher premium (17%, 20%) so I always wonder a bit who they are for. It's unlikely they can be resold for that much of a premium. At least the shops I use just buy them for their price in gold.
Could you talk more about the "recent Chinese coins"? China hasn't had any fiat money containing gold or silver for at least 100 years. So I'm curious what exactly these Chinese coins are.
I don't know the details because I don't really care about gold as an investment, but everything I find says variations of "the 3g Gold Pandas have a face value of 50 Yuan and are legal tender in China.". It would be subject to VAT in Belgium anyway if it was not considered to have legal tender.
And that's the smallest one, I seriously doubt many people buy a 4000 € (30g) coin as a tourist gift.
It is definitely not legal tender. As a Chinese, I've only ever seen such things in tourist souvenir shops for foreigners. If your argument is that a €4000 souvenir is questionable, please allow me to remind you that a €4000 currency coin makes no more sense. If your source is this webpage: https://www.kjc-gold-silver-bullion.com.au/PD/30-g-2023-chin..., I can be almost certain it's a scam because its description is ridiculous.
Also a very good question and the answer is also...it depends. The "premium" (delta to spot) on 90% silver (aka "90%") varies with supply and demand. At this very moment with the meteoric rise of base silver, 90% is selling for less than spot. But there have been times when it trades above spot.
The reason is that silver itself is traded on the various international commodity exchanges and those traders are not the same supply & demand sources as the little guy(s) who likes keeping some old silver coins in their garage. So as those supply/demand curves shift, the premium over/under spot price changes as well.
Also I heard that refineries that is companies that take 90% silver or even less in and processes it to something that can be sold on commodity markets that is purer silver are now focusing on well purer silver as that is easier to process. Thus there is less demand on less pure silver. And recycled silver ending with industrial use goes through these companies.
In my case I buy old French 20 francs coins as they are quite "cheap": 1% above spot price of their gold content (they are 90% gold).
Other more recent coins, like Chinese or Canadian ones, sell at a much higher premium (17%, 20%) so I always wonder a bit who they are for. It's unlikely they can be resold for that much of a premium. At least the shops I use just buy them for their price in gold.