I've bought plenty of stuff online, as well. My problem is dealing with the CA hurdle, which can be a pain and costs much more than a typical FFL transfer fee. I'll just have to wait until I head back to FL for Xmas. My question was more about the address on my license versus my "permanent residence," but I'll save that for another thread.
Another possibility, for others maybe moreso than you/CA....If you can qualify as a seasonal resident in a state, that state may allow firearms purchase in that state, even if you hold a DL from another state. Completely legal in places such as Nevada. NV has a seasonal resident ID card, issued by DMV.