One thing that i like about crawl spaces is all the old stuff that one can find, Old beer cans, bottles, cups from local fast food places, old newspaper from 40s, 50s ..., I have yet to find anything that has value, like old 100 bills :):)
One time i found a pure body of a dead rat, it seemed like it was mummified, this may sound nasty but it was beautiful, i brought out to show to the customer. She got excited about it and kept it to show to her nephew.
