Sablock is actually alot more than 80$.
Post Rotation:
Promocroak: 25~30$
Uxie X: 25$
Sableye: 3~5$ each
Garchomp C X: 5~10$ each
Crobat G: 3~5# each
Uxie: 3~8$ each
Giratina: 3~5$
Pokemon lineup alone is more than 80$.
Now lets look at the trainers:
Cyrus's Conspiracy: 3~5$ each
Poke Turn: 3~5$ each
Energy Gain: 3~5$ each
Power Spray: 2~4$ each
SP Radar: 1~3$ each
Collector: 1~3$ each
Judge: 1~3$
Expert Belt: 2~5$ each
Trainers are around 50$. Decks already above 130$.
Energy:
DCE: 3~8$ each.
Looking at just under 150$ for the entire deck if you get each card at its lowest commonly asked price. The deck almost triples in value if you're looking to foil the deck out, and get SV Garchomp X instead of the Tin.
The deck doubles in value if you're unable to get cards at thier lowest asking price. Remember that sableyes, uxies, and the SP engine are deceptively expensive since you're buying 4x of most of the above.