They are a legit company, but very overpriced on things like this. Silver-plated versus solid (the core will be pretty much worthless metal content), and silver is only about $25/ounce currently, so you are not really getting any significant precious material content that would give it much intrinsic value.

Considering it would be close to $1,000 to assemble the whole set, it’s a pretty pricey proposition that would not likely have any great resale value later. Stuff like this comes up in my numismatic circles all the time, people are generally better off buying bullion if they want some in hand precious metals.