Sorry guys! I will keep my lip shut about certain things in the future.
I was indeed planning to buy SH4 Gold, but I was mainly concerned if "used" copies were still kosher.
Rather, I can buy SH4 Gold as a digital download from Amazon for $20, or I could get a used, but tangible, disk for $5. I did click on the subsim link at the top of this page here to start, so subsim should get a cut either way.