You just never know what you will find, so being educated as to what is of value will be your best strategy. I have found a few gems at Estate sales rather than garage sales. Go into the garage at the estate sales, and find the tool box with stuff in it. Look at the bottom, the man who passed on, probably has a 60's slipjoint or two in the bottom of that tool box. I bought a whole box once for 20. I just liked the tool box. Once I started seeing what was in there, I found some great tools, but also a Queen City Jack knife from the 40's. It had Queen City script, and although a tad pitted, it was worth a cleaning and then a Father's day present for dad. He thought it was cool. It made my older brother jealous. LOL. It was that durn knife that brought me to Blade Forums, as I googled Queen City Jack Knife and guess what showed up. I started reading this forum and bam! I was an instant knife nut. I always liked knifes, but nothing as compared as to what transpired once I actually educated myself on them. Enjoy, keep looking it takes about 10 antique store visits to find a knife worth buying IMO. However, I found some pretty cool ones in antique stores. BTW, if you shop estate sales, and bring up one item, you will be charged 10 dollars, if you bring up 5 items, you will probably be charged 15 dollars or maybe even just 10 dollars, so do not be overly choosy, pick up some screw drivers, some flat files, a hammer, and that pocket knife, then purchase them all together, and enjoy the value and the history of those tools.