For the most accurate number, cross-reference at least two or three reliable sources to get a balanced view of the current market and avoid making a bad deal
Miraidon #13 Pokemon Promo Keep track of your collection value over time
Add in the low supply of many Reserved List cards (which occasionally allows sellers to manipulate the headline price number by listing a copy at an unrealistically high price point, which is how we ended up with Moat at $100,000 this week, even with a BSG 9.5 copy for sale at $3,400 and a played copy at $1,500), and the headline price of a card tends to overstate the price that you can actually get the card for, if you are willing to lower your standards a bit
Many fans tell me that isnt too far off
I asked if anyone would be interested in this niche set and few people liked it (probably out of politeness tho ) so i decided to go for it
Demonic Tutor, Demonic Hordes and Demonic Attorney all made their last stands in Revised, as did, Contract from Below, Sacrifice and part of the artwork in Unholy Strength