Not a store-bought one anyways.I would think that a suppressor tube would not be sold in an auction since it is an NFA item.
I vaguely remember a book I read back in junior high. Guy was poaching alligators, using a 22 rifle and baby bottle nipples stretched over the muzzle.
I know, I have two of them. They make great solvent traps, which is what they are sold as and pretty much all they are good for.You can readily buy "fuel filters" online that are actually do-it-yourself suppressor setups. That one seems to be missing a few parts though, they usually come with one end threaded for either 1/2" or 5/8" and you drill out the baffles and the other end for whichever caliber you're planning on using it for. Once all done though you're supposed to serial number it and file the usual paperwork. Doing it yourself does dramatically cut down on the time it takes to get your stamp.