Wow! that is a bargain! Congratulations. Our Samantha mattress is more white than an unbleached muslin. But I wouldn't call it a crisp white.

Now the mom in me recommends to follow the washing instructions. 20 years can create a lot of dust. I'm allergic to dust and so is DD. I'd definitely recommend some laundering to shake out the dust bunnies.

Then after it dries, make sure Samantha and Nellie jump on the bed to fluff it up!!!

Enjoy,
Michele