I sort mine by part #. I audition them on a breadboard or maybe a socket on a PCB. I usually don't see all that much spread in HFE or leakage for a specific part number, but there are notable exceptions. Most of my AC127s are very leaky. Most of my PNPs and 2N1308s are low leakage. I have a tone of 2N1308s and 2N1309s. There is a 5:1 HFE range on those, so the high HFE ones get a color-coded dot on top. At the end of it all, I have to audition them because it's hard to predict which ones will sound the best. Some circuits are pretty forgiving. Others require just the right HFE or leakage. I plan on having to tweak a resistor or two to get it dialed-in. Building with Germanium is far from a plug-n-play process.