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PSA 10 versions have been known to be listed for $5000 online, which were snapped up

Prices typically adjust 10-20% in the first 2-4 weeks as supply stabilizes

An alteration artist selling the cards, who is abundantly clear to consumers that they lack affiliation with WotC, that they are only selling the alterations, and not representing that they made the card, may be safer than an artist who does not make an effort to make the source clear

In a dedicated Bird deck, the +1/+1 counters will add up over time

This has obviously led to significant, consistent price growth, as well as blunt attempts at market manipulation