Another way to start building rep is through trades. As initiator, it's proper for you to ship first. It's an easier way to get your foot in the door as the risk lies almost solely on you. When using this method it's important to find someone already with a good reputation so you can feel more at ease. Hopefully they will post up some positive feedback on your packing and reliability and coming from a reputable person it'll carry even more weight. I'm a stickler for quarantine, long ones at that, so I wouldn't personally do this more than once a year or nothing would ever escape the quarantine room - I'm picky about where my animals come from and how many are introduced to my collection.