From TIRES to T-BONES cheap does not imply a smart purchase by any measure. I have a saying that goes like this...
I've suffered a two-dollar meal that was a ripoff, and was thoroughly satisfied with a fifty dollar extravaganza I considered to be a bargain.
I did not get a nickel's worth of discount on my Trace 4024 MSW inverter that arrived when Ronald Reagan was in office. But it still works (some repairs)
I just bought a computer USB keyboard for twenty dollars. It weighs about 2 pounds but its reputation is that aside from drowning it is invincible.
I checked out the SAMLEX waveform on my Tektronix scope. Near 320 watts its sinusoidal waveform is flawless.
When I check power bricks, and they run 10-20 degrees warmer under load on my Trace inverter that's the end of the road for their quasi sine wave operation.
When I do not have enough money to buy other than junk grade stuff, the money goes into a piggy bank until I accumulate enough to buy better than chew-and-spit grade.
It just does not pay.
Dickies brand pants and shirts are not cheap and seldom found discounted. But the pants and shirts I purchased EIGHTEEN YEARS AGO are absolutely useable around the house. They have no rips or tears, no thin spots, no missing buttons, and have outlasted what (?) five or seven similar items at a third the price?
Lifetime guarantee tools are stupid if you end up paying four times their price in gasoline to exchange them after they break.
If you save fifty dollars on an inverter and it imitates Krakatoa, how much are you saving? You lost use of it. Get out your calculator because until you replace it you are going to accumulate nothing but lost money, lost time and lost usage of an inverter.
I would like to purchase lots of things right now. But I am not going to play stupid and buy junk. I do not have enough money to waste it.