Which is roughly... twice the average price of a new pack? That actually sounds about right for that rarity. I mean, I haven't been buying cards lately: I am broke. Last time I was able to, if the hot, in demand "Ultra Rare" Pokemon card was going for $10 a pop, that was about right. Using numbers not adjusted for inflation, the rough "cash" value of cards in my old area (Iowa, not known for super high prices) was something like commons were about $0.25 (unless Basic Energy), Uncommons were about $0.50, Rare cards were $1, Super (Holo) Rare cards were about $5, and whatever was functioning as the "Ultra" Rare at the time went for about $10. At these prices, unless you were unfortunate to get a pack full of card no one wanted (e.g. duds), the contents of the pack were worth close to what the booster retailed for.
Averaging over $6 a card for the rest of the deck seems absurd. Hyperbole has its place, but the idea is to be an obvious and intentional. If it isn't obvious, it isn't really worth using. $400 decks don't exist that often in Pokemon (well, when I was paying attention) but occasionally they do happen. This seems like a poor place to use hyperbole when the point would be better made with an accurate estimate.
If it is a $100 deck, that is still enough to be distasteful. Of course, it requires the entire deck be cards that would be cut.