My advice
The old days of going to the junk yard (now called scrap yards or recycle center) are mostly gone, there are some far and in between and they know what the highest value they can get for what you’re looking for.
If you not a rightest NOS (new old stock) type and will settle for good parts then the internet is a great source. I would suggest;
a) see if the part is being reproduce. If so what is the going price search all suppliers.
b) Can the part or item be found in good condition or repairable condition that I can fix have fix or live with.
Give the internet a chance, but remember people are trying to make money, and the shipping cost will increase the cost of your purchase. You can get real bargains. And some people are still fair. A lot of people ask the question what is specific part worth (example a original beach seat) old trucks have been modified and the seats were replace with new model bucket or bench seats, not really looking good. So these are out there but hard to find so the price may be high and the seat will need to be re-upholstered. Something you may try to accomplish yourself. But the question is how bad do you want that original beach seat!
I located a big window cab in southern California very little rust for 500.00, I had it shipped to Virginia for $600, I got two things accomplished. Got a big window cab and a rust free cab replacing my small window rusted out cab. I am just bless to have a understanding wife and a career that supports my hobby.
This forum is a wealth of information read it and decided what is in your best interest and availability.
God speed.