My personal opinion is that it's a reasonable price, as long as the talents can reasonably afford it. No matter how reasonable Pixel Link is about linking to other accounts, it's better to keep the original account and not risk losing part of your audience changing to new accounts. A high-quality corpo vtuber model could easily be worth $5,000 or more, especially if it's by a well-known artist.
But what does everyone else think about the $10K buyout price?