What can I salvage from a deskchair with a broken base?

wheels.

Do you have a good hardware store in the area? Lowe’s or Ace or a lumber yard? I would repair it too – but not with glue. I’d get a small piece of hardwood that was the right size to fit into the wheel base and would run some deck screws through the plastic and wood to make it strong. I might even use JB Weld between the wood and plastic to keep it really solid. To top it off and make it look good, I’d wrap the break with black electrical wire all pressed tightly together. I’ve got all this repair stuff in my basement and this would be a perfect application for it. It would be an hour well spent. You’d have a chair that will last forever.

Alternatively, you might find some place that has one or more chairs with worn out, stained and ripped upholstery and a good base, and buy that for a song to replace your base with theirs. I see tons of chairs with worn upholstery, but not so many with broken bases.

Nothing. Run away, run away. Keeping broken things is the first sign of clutter.

@marinelife I say fix it if you have the skills. Buying another chair wastes money and world resources. If it is beyond repair then it is ok to pitch it but at least give repairing it a try.

You may be able to buy another base, either from another chair (as @CWOTUS suggests) or directly from the manufacturer. If all else fails, you can always carefully cut away the upholstery fabric/vinyl and use it to cover something else, like a pillow, and use the castors for another project.

Incidentally, they sell office chairs for big and tall people these days, rated to withstand much greater weight than the average chair. You might want to look into one of those.

Get yourself an old wooden office chair like this one. They’re more comfortable than they look.