I like them. They are just as authentically ancient artifacts as official issues. They are made by different but related processes, and possibly could have been made by the same workers.
They seem to carry the taint of "
fraud" with them, even though a disclosed
fouree isn't a
fraud on the modern buyer. They also seem to carry the nearly moronic taint of not being full precious metal, that the "bullion" value of a
denarius, maybe $2.50 current silver, is something that will enable you to buy gas in the zombie apocalypse.
Fourees should be rarer than the prototype, all other things being equal. They pose interesting puzzles of numismatic and social interest, at least to me.
The main downsides are that most detected fourees will have a broken or corroded surface and so aren't pretty, and, since many collectors avoid them, the resale opportunities are not as robust as official issues.