Counterfeit Mercury Dimes question

Can anyone speak to the extent of counterfeit semi-key Mercury dimes? I'm not asking about slabbed 1916-D, 1921 or 1921-D coins. I'm talking about coins like an XF 1919-D, 1924-D or 1925-S.
One of the things that bothers me about today's counterfeits is the link below (borrowed from a post earlier this year) describing how folks in China can make money selling $.99 items.
It stands to reason that if you can make money selling $.99 items, you can make more money selling $25-$50 items. And since you can regularly buy $5.69 1916-D Mercury fakes on eBay, the technology evidently exists.
Your thought and/or experiences are appreciated.
https://thydzik.com/how-do-chinesehong-kong-sellers-make-money-on-ebay-with-99c-free-shipping-items/
If we were all the same, the world would be an incredibly boring place.
Tommy
Comments
I suspect that if there is money to be made they are cranking them out. However, that being said it might be more profitable to fake some other coin or series. So, maybe they are not cranking them out.
bob
Sorry state of affairs when even junk silver is not safe to buy.
Ain't that the truth.
I once found a 1911-S Lincoln that was altered from a 1944-S. The tooling was excellent. The mintmark and the VDB gave it away. There was a lot of time spent on that alteration for not a whole lot more money to be made.
Pete
Such a shame.... however, it is the tale of the ages.... where there is profit, there are those who will fake it.... Just look at the premiums for tarnished coins?? And so many of them are AT... and, when AT is done right, it is no different than NT....Of course, people still buy the blatant AT coins and pay unbelievable premiums....Cheers, RickO
Why buy only semi-keys when you can buy the entire set for $31?
https://m.aliexpress.com/item/32688272410.html?pid=808_0000_0109&spm=a2g0n.search-amp.list.32688272410&aff_trace_key=bfdcae7c52f0457e8396c4b73fa56239-1539009042645-04587-UneMJZVf&aff_short_key=UneMJZVf&aff_platform=msite