I figured it was time to create a proper thread for what eventually got me back into keyboards way back in the day. Typewriters. I've had almost as many typewriters as keyboards and have learned a few things along the way. Post pictures or videos, ask questions of any kind, or just generally rant about how much you love these old machines.
I figured I could dump a few resources here in the OP just to help people quickly find places to start looking for good typewriters. If you are looking to buy a typewriter to actually get a lot of use out of, I would highly recommend getting a restored/serviced typewriter and not the cheapest one you can find on Ebay. There are indeed a lot of great deals on Ebay, but I've found that they are often more trouble than they are worth.
MrsSpeedBump actually introduced me to Etsy a while back, and I've found that is actually a really, really good place to begin the search. Most restored typewriters tend to be in Europe, but even with ~$50 of shipping they are still normally cheaper than refurbished typewriters stateside (for those of you here). https://www.etsy.com/search?q=working%20typewriter
If you take a gamble on Ebay, just be careful. You can luck out if you check the seller ratings/return policy. It is always good to ask for a type sample of the entire alphabet as well.
Manual or Electric?
Now, if you are thinking about buying your first typewriter you'll have to decide if you want an electric or manual typewriter. Along with personal preference, workload and what you plan to use the typewriter for can really influence what type will fit you best. For me personally, I enjoy manual typewriters. I write poetry with very spastic margins and spacing, and manual typewriters really make that easier. Manual typewriters made 50's and later are also usually a lot more portable and lightweight, allowing you to easily store the typewriter when not in use. The main downside to a manual typewriter is that your typing speed will be limited. While some allow for you to adjust the pressure needed to actuate the key, you still won't be able to touch type at 140WPM. Each stroke will need to be decisive, otherwise the lettering will be very light. Manual typewriters can also be extremely complex and difficult to fix. This is the main reason I really encourage looking to get a refurbished manual.
Electric typewriters are definitely made for heavy workloads. If you plan to write a novel or research papers, I'd strongly suggest looking for an electric. While they are often heavier and less portable than their manual siblings, electric typewriters are often robust enough to handle constant use and much higher typing speeds.
Finally: when in doubt, buy both.