Firstly, CONGRATS! What an awesome find!
Secondly... If you decide to clean up the G3's, maybe a de-tinseling is in order, then you could be able to straighten the hair back to silky if you're lucky. De-tinselling can be tedious, but it can make a difference with G3's with bad hair. Don't try to heat that iridescent tinsel though, whatever you do - it'll just shrink up unless it's REALLY low heat - too low to help the rest of the hair.