One thing that you will find in the market place are substantial price differences from one inverter to another, not only between Modified and Pure sine wave but also between different brands. Due to the market for such items becoming more competitive, there is a growing demand for a large number of products entering the market that are made for the lowest possible price, with no regard to over all reliability or actual performance.
At the cheaper end of the scale a consumer would expect to pay around $500 – $1200 for a cheap 1000 watt inverter.
A consumer after a good quality unit could expect to pay $1800 plus for a 1000 watt inverter.
When shopping around for a power inverter ask yourself if you want a cheap inverter that, over the long run may end up costing you more and possibly damage your valuable equipment; or a good quality unit that may cost a little more but will give you many years of faithful fault free service? Keep in mind that in a situation where you rely on batteries for your power, an unreliable inverter could cost you a lot more money than you expected.
Obviously the answer is realistic power usage requirements and diligent research into the attributes of the actual inverter system before handing over your hard earned case – or you may regret it later!