First up not every vendor is out to scam you, unhappy customers are a pain in the ass and vendors generally just want to vend with as little hassle as possible. For your initial orders just buy domestically, avoid the risk of a customs seizure and build up your stats by finalizing promptly for the orders you receive, The chances of a domestic seizure and incredibly remote so just pick your vendor carefully, maybe open a dialogue with them before ordering to get a feel for them and go from there. With regards to requiring tracking not all orders automatically come with tracking, you should discuss that with the vendor when placing your order.