I have the opportunity to buy a blueprint filing cabinet through a Facebook market and I need help with some ideas. The guy says each section has 5 drawers. He has 4 sections and they all will hold his 27" x 40" posters with room to spare. He's asking $200. My dilemma is that none of the sections have a locking mechanism and I don't know what the drawer slides are rated for. I need help coming up with some ideas on how to lock this thing down so my tools don't walk off. If it's not a good candidate for my purposes please let me know.