The listing clearly says payment is though company check or wire transfer, so eBay does not charge or handle the sales tax.

Further, the listing clearly says Washington residents only will be charged sales tax, which is curious since the item is located in Idaho.

But more importantly, nobody is going pay $a quarter of a million each for those old technology hunks of junk, so sales tax will not need to be considered.

Always amazing to see the questions and comments when the info is right there in black and white.