The more I thought about it....
I'd be hesitant to accept or deal with something that has been so covered, or soaked in "some" undefined liquid.
And shame on Fedex AGAIN for not disclosing what they know before the customer came in contact with such a potential danger.
What if this box was below another box containing some undisclosed containers or chemicals that leaked during shipping.
And the thing is, the vacuum is/was new, so you don't know what it's supposed to smell like. the smell of "newness" and some chemicals are not coincidentally similar.
I'd be really cautious to play with the new toy until you find out more.
You can always live another day to find another ACTUAL good find; but something that might be contaminated by a meth manufacturers sloppy package that leaked..... is it seriously worth damaging your health?