I think you did pretty well, if you are referring to this
Like @ncc74656 mentioned , the Black Friday/Cyber Monday sale has some really good deals, I AM SPECULATING HERE, but I dont think you could get the xSIID cheaper even during Black Friday/Cyber Monday than you recently did.
Now is the time to pick up an xSIID if you are even just thinking about it.
So well done, as a conciencious and broke student I think you bought at the right time