Just my 2-cents worth: The only truly accurate scale is, as others have said, the one with the weights that used to be in the old-fashioned Dr.s offices (balance beam style). My mom had one of those because she was an obsessive dieter and weighed herself every day, or even several times per day. It took up a lot of room and was a pain in the butt. If you don’t have that one, there’s really no point in replacing your scale because none of them are very accurate.
And, here’s the basic reality: “accurate” is all relative. We’re not talking body “mass”, we’re talking “weight”, which is a function of gravity, itself. " In scientific contexts, mass is the amount of “matter” in an object (though “matter” may be difficult to define), whereas weight is the force exerted on an object by gravity." So, weight fluctuates, not only IN the body, but by where the body IS.
The only really good way to use a scale is to NOT WEIGH YOURSELF VERY OFTEN. That’s the only thing that really works. Don’t get back on the scale after taking your weight, “just to check it”. Just take the weight it gives you, write it down if you need to, and don’t weigh yourself more than 1x per week. 1x per/ 2 weeks or 1x/ month is actually better. You weight fluctuates from hour to hour anyway. If I get up and go the the bathroom, then get on the scale naked, I’ll have one weight. If I then brush my teeth and take a couple of pills with water, my weight will then be different. It can, literally, be the difference of a full pound.
The weight on a scale is not truly reflective of your size or your health. It’s just a number. If you want to see it go down, and you are doing everything that you need to do correctly (diet, exercise, meditation, whatever), the less you weigh yourself, the more “accurate” it will be.
BTW, I got my current scale at Costco. It’s fine. Yours is fine as well.