At shows we often take trade ins on used boots.  It's a great way for us to get extra boots to use on our own colts, but if we get very many we put them up for sale here.  We'll grade them as to condition-  Excellent, Very Good, Good and Fair.  If they aren't at least fair, we'll toss them in the garbage.  Fair means they show a little wear, maybe have frayed a little, but the Velcro still works pretty well and you'll get quite a few rides in before they are completely worn out.