What's happening? Let me try to answer that.
Well, sellers are confused and/or trying to milk the GST confusion by charging extra prices. They are either ill informed / confused and charging 18% tax on top of the current prices, or they are smart to know that this confusion state is a good way to milk the innocent buyers who really need to buy stuff *today* rather than tomorrow.
Prices will remain like this for few months, after which things should stabilize. I already bought my SSD before GST for this exact reason. (Prices reached HIGH as soon as I bought it and GST kicked in). I hope I do not need to buy any electronic gadget before few months (tho, I do think I would need to buy a new motherboard before that, since I am currently in a nightmare of my PC not being able to boot :'( but that's another story).