In an auction their would be more interest in the name, which means female friend in Portuguese and Spanish, than the company....
Amiga Inc. does not own the word, "Amiga." They own the trademark for the use of that word with respect to technology. If someone else wants to come up with a brand of chocolate bars and call them "Amiga" or a new shampoo called "Amiga," they may lay claim to such a trademark right now without paying Amiga Inc. a penny.
For better or worse, I think the Amiga trademark still has quite a high value. I would sell my house for it, but I have a feeling that I would need about 10-20 more such houses!