You can check out eBay, but be aware that some people forget these kinds of device need maintenance to stay functional (and not many people can do that kind of maintenance anymore).

https://www.ebay.ca/itm/334185652907

For example, that one is just listed as "good used condition". No information about how old, when it was last maintained or repaired. It is possible the mechanisms are in good order, or they are verging on failure.

http://www.braillebookstore.com/Refurbished-Perkins-Brailler.1

They sell used ones, and their website states they "Cleaned, repaired, fine-tuned, oiled, and personally tested.
We offer a limited one-year warrantee".

Looks like in your area, you might try Columbia Lighthouse for the Blind, and see if they are selling any of theirs?

I've asked the same question actually, you can try asking your local blind Services if they have any suggestions for you. At least that's what someone on here told me to do. I'm visually impaired and do not have access to a brailler because of the same reason you do I can see enough that I don't need one but I do eventually want to get one and actually own it because I don't want to borrow someone else's just for the safety aspect.

Check blindbargains.com as well. Here’s a listing from earlier this year for a Brailler for $125.

https://www.blindbargains.com/classifieds.php?m=5326

People sell them on the blind ads mailing list often.
blindads+subscribe@groups.io

Is there any reason in particular you’re looking for a perkins brailler? For the same amount as a refurbished perkins brailler that will last you, you could pick up a cheap braille display like the orbit 20, which will likely function for longer and better than a perkins brailler