One of my first Ebay purchases was the U.S. Industrial 3X recoilless rivet gun shown in the picture below. I wrestled with whether to get a 2X or 3X and finally settled on the 3X. It came with some rivet sets and a regulator. It's a good tool but I have since acquired the ACAT 2X gun shown in Image 2 and it is currently my rivet gun of choice. The 2X hits lighter with more blows than the 3X. For the riveting so far, the 2X works a little better for me. Others might prefer the 3X.
One of my best purchases was the Chicago Pneumatic squeezer shown in Image 3. When acquired on Ebay it came with the very large U.S. Industrial C-Yoke at the bottom of the photo. This yoke is too heavy for anything but bench use and requires a longer than standard ram. At some point I may mount it on a workbench and get a foot operated trigger for the squeezer but for now, it stays in the tool chest. The other three C-Yokes are used often depending on the components being worked and the reach required. The yoke currently mounted in the squeezer does not have a hole in the top to accept a set. It is solid so you can reach into a tight space and squeeze against the yoke itself.
I know pneumatic squeezers and the yokes are pricey but they are great tools and will spare the muscles in your hands, wrists and forearms. You might get lucky and find a good used or reconditioned squeezer on Ebay for a decent price. By the way, when buying aircraft tools on Ebay I have found the folks you are bidding against know the value of the tools so it can be hard to get the "incredible" bargain. I am usually just happy with a "reasonable" price.
