I have some filing cabinets like the bank ones--nice for things like drills ,saber saws,hardware,and the soldering iron,etc..
I lucked out at several swap meets and flea markets and got some good deals on some steel drawers used at a hardware srore for a brass fitting assortment,and a few I scored at the parts stores when they cleaned the storeroom of old dispays out..also found a nice set that I hung on the wall at a machine shop closing down,they had a big "yard sale" and I loaded my El-Camino to the hilt with 200 bucks worth of nuts,bolts,screws and the drawers they came it...
I would say try looking in auction listings for closing stores or shops,you can get a lot of that type of stuff cheap at those liquidation sales..
Craigslist often has some too,usually the guys who bought them at auctions flip them for double what they paid ..