You don't need anything fancy, fortunately. For handhelds, I use Bearcat 100XLT, 200XLT/205XLT, but they are older models that will need the 6 cells in the battery packs replaced if it hasn't been done recently. Other similar, even simpler models for home or car use are 145XLT desktop and 560XLT base/mobile, which are very easy to program and have great sensitivity & audio.
Contemporary analog scanners would be the BC355N base/mobile, BC365CRS desktop, BC125AT handheld, all can be had for around $100 & less. The newer scanners have faster scan speeds and more search / service search options at the expense of complexity.