Idk anyone who searches by highest first. Lol. eBay automatically defaults to best match and then most would probably select low to high.
I would be one of those people who search from High to Low. To me its usually easier to find what I am looking for that way and I will back track pages to what I am looking to pay. If you go low to high then then you have like 50 pages of crap for like .01 cents that has the keyword you were searching for.