I tried clicking on offerup logo and that brought up the search box in mobile.Thanks for the site suggestion. I just checked it out and can't seem to locate the search box on mobile. I put my phone in desktop mode and the search box briefly shows up but then disappears.
Here is desktop view.
View attachment 1275659
Here is mobile view.
View attachment 1275658
Here is desktop view before I click on search box field.