No "ParrotWizard" expensive stuff necessary, we just use the $15 kitchen scale from Bed, Bath, and Beyond and hit "Tare", lol...
Well I bit the bullet and it has already been ordered

Might be here by Thanksgiving
Thanks folks for your responses.
Jim

I was kidding Jim, it looks like a nice scale, I'm sure it is...I'm just a cheapskate...Honestly, no joke, I am...Which works out well because I love building all my own stands, perches, play-gyms, aviaries, toys, etc. I have a huge workshop with all of the necessary woodworking power-tools because I repair and restore guitars/basses as a side-business, and my garage is built under/into my house, and it's too small to really keep a car in, so I just turned it into part of my shop, with the rest of it right through the door in the walk-out level of my house. So yeah, I'm cheap, lol...
As far as the scale thing goes, nothing wrong with buying an expensive one if that's what you want to do, it's just good that everyone know that as long as whatever scale you're looking at has a high enough "upper limit" to weigh your birds (most digital kitchen scales go up to at least 1kg, so that's plenty), and as long as you can change the units into "grams" from "pounds", then it can easily be used to weigh your bird(s), and you only have to spend between $15-$20 at any Walmart, Target, Bed, Bath, & Beyond, etc.
And if you want to attach a little tabletop perch to the top of your digital kitchen scale, like the one in the photo sold by "ParrotWizard", the easiest way to do so is to either make a little tabletop perch exactly like the one in the photo out of PVC piping and fittings yourself (that perch would cost less than $5 to make with PVC pipe/fittings from any Lowes, as long as you have a $10 PVC pipe-cutting handtool), OR you can just purchase one of those "jewelry display" things that look exactly the same as a tabletop perch at any Walmart, in the arts/crafts aisle that has all of the jewelry/beads in it, for around $8. They are those display things that are used by jewelry stores to show-off bracelets, and Walmart sells one in the arts/crafts aisle where the beads/jewelry parts are that is made out of PVC and covered in Burlap! It's perfect to use as a Tabletop-Perch for your birds if you don't want to make your own out of PVC piping/fittings and some Vet Wrap...And then all you have to do is to secure it to the platform of your digital kitchen scale (the method you use to do this would depend on whether you want it to be temporary or permanent)...Very easy, very cheap, and basically the same thing as the ParrotWizard scale/perch...
Just always nice to present an alternative for people who either can't afford to pay $100 for a scale to weigh their birds, or are like me and just extreme cheapskates, lol...Seriously though, it's very important to weigh your birds and keep-track of their health, so buying any digital scale that will get the job done is very important, and it doesn't have to be a fancy, expensive "chemical/scientific" digital scale.