500 bottles from half a kg?? damn. They might confuse me for a dealer then. 
See that is the problem that exists bro.
First, you don't have to order that much powder. Most places have a 100 gram minimum and some have a 50 gram minimum. Some will sell it in 5 gram batches, but of course by the time you purchase 20 of the 5 gram batches, you have paid about 5x the amount you would for a single 100 gram batch.
For personal use, you can get 50 standard 10ml bottles at 200mg from a single 100 gram batch. (just using the vial size and product strength for illustration). So a 100 gram batch will last you a pretty long time. If your cycle and AAS is moderate where you use a dose like 500mg weekly, that would cover about 10-12 future cycles of the standard 12 weeks or so. Now consider that most moderate steroid use involves 2 cycles per year, you would have 5 years worth of test to use then.
**This is of course all judged by average standards of moderate use. Not reckless abuse or misuse**
So for the average user, that is a great deal in terms of AAS cost and convenience.
Unfortunately, it is a great risk as well. The DEA has different standards for what is considered "personal use" when the product is in raw or finished form. It takes less powder to get a conviction and charge on you than it would take for the same/equal amount of products in vials.
So if I were you, I would just purchase finished products already and stay away from the risk of importing raw materials.
