Welcome FluidDrive! (DeSoto, or Chrysler???)
I've been collecting TVs for a long time, and I have found that eBay is a great place to buy large consoles that are closeby you, as nobody wants to bid on a $80 TV and pay $500 to ship it. So you can search a local eBay search. Smaller TVs do tend to go into orbit on eBay, so you probably will not get the best deal on eBay with those.
Garage and estate sales are great! Seems that very few people who attend those sales have any knowledge or interest in TVs. If in a big city, it is always good to get on good terms with the local thrift stores. They usually hate TVs, but if you tell them you will buy, they will call you when somebody leaves one behind the shop!
As far as restoring, I agree with Jordan about being careful if you're not a TV tech. I started with restoring small tube radios when I was about 8, then I got a job after school at a TV repair shop when I was 13. That was how I got my background in TV and electronics. You will have headaches if you try to restore a TV cold-turkey, I would think. There are other collectors here on this site, and elsewhere, who can help you with repairs and restorations. Some of them will even do the job for you professionally. And another thing to consider is that many collectors want their TVs for aesthetic purposes only, and don't care to repair them. In fact, some very rare TVs are worth much more in "virgin" condition not working than they would be if restored with new style parts. Personally, I like one or two sets in restored working order, but not all of them. After all.... They will fall in disrepair if unused for years, and it becomes a burden to keep them all operating on a regular schedule.
Charles