Searched web to buy pure sine wave inverter. Found TrustedHints.com who claim they are "a team of people who rigorously test products until it passes our all requirements and we review them according to there different features like prices, Quality, Brand, Material and so on."
Checked out their "pure sine wave inverters review" and it turns out most of their offerings are "modified sine wave inverters", which are different. Very different.
A little further investigation into other products and it becomes obvious that these people are, at the very least, extremely incompetent and at worst, fraudsters. Obviously, I did not buy anything from them and I suggest that any business dealings with this organization are at the buyer's (high) risk.