While NM sales could easily push this card's market price up, it will need to wait another day to claim the top spot as the most valuable Houndoom card
You have infinite ways to express yourself, from the Commander you pick to the cards you put in the 99, the win conditions, the removal, the ramp its all customizable down to the last detail, and thats even before you consider what basic lands to pick, what foils and showcase arts to choose, and even your sleeves and deckboxes
Even mid-grade copies hold their value better than almost any other card from the era, because the demand for Base Set Charizard is so broad and so deep that it supports pricing across every condition tier
Just investigating when creatures die is already something to be interested in
There are an unfortunate amount of scammers trying to pry off your stuff by requesting free trades