I read through the forum posts for recommendation for home gym equipment. I haven't been to a gym for over 6 years, my arms and back muscles have become very weak due to my posture and lack of exercise. I am mid 40s IT worker and for last 2 years now permanently WFH. I have large space at home. My goal is to just build enough upper body strength. I have been to physio who suggested dumb bells and bar bells.
Anyway I want to start doing some simple home gym with weights up to 20-30 KG only to start with. Looking for some basic level bench press and rack type equipment within $500 + weights. Any recommendations. Kmart and Kogan have some cheap ones like
https://www.kmart.com.au/webapp/wcs/stores/servlet/ProductDi…
https://www.rebelsport.com.au/p/celsius-bc3-standard-weight-…
https://everfit.com.au/collections/strength/products/everfit…
https://www.aussiefitness.com.au/Bodyworx-C340stb-Basic-Benc… (sold out though)
One huge problem with all of the ones you've linked to is none of them have safety bars. I'm assuming you'll likely train alone so IMO it's critical you have safety bars. Other than that, unless you're very tiny and somewhat weak, even 30kg is unlikely to be enough weight for bench press.
I can't recommend anything within a $500 budget other than to say look at gumtree etc for used. Another few weeks is when people will start giving up on new years resolutions and the few months after that they'll start looking to sell the stuff they bought.
EDIT: maybe look at a calisthenics program? Body weight training is very effective.