Yeah they are selling him short. A boxed Fort Max alone is like $1200 and he had multiples.

He had an army of Scorponoks whch complete go for like $300-$400 and boxed (which he had) can be like $800-$1000

A complete Mirage is like $100 loose and he had an army of them.

His collection should be worth at least $50,000 but the hassle as mentioned in the video is that he would need to categorize them all and sell them individually which is time consuming and with costs involved as no one is going to drop him $50,000 in one go.