$25 is a total score. New, the cheapest Atlas shoes retail for around $130. So you got yours for at least 80% off retail. You may have done way better than that, depending on the model.
The newer shoes have a fancier strap system that is more like a slip-in shoe, while the older ones like I had, just have straps, which works just as well, but takes a bit more fiddling to tighten up. Maybe an extra 2 minutes, so no big deal. Mine were 1025s I think. I'm pretty lightweight, so I got small ones.
Look on the Atlas website, if they aren't too old, the same model might show up. Measure them to see the size, then compare that with what's on the website. They make different models for trail and mountaineering use.http://atlassnowshoe.com/producthttp://www.backcountrygear.com/catalog/familydetail.cfm/Snowshoes