The value of your record depends on a myriad of things. Is it in good condition or just like it came out of the sleeve if there is a sleeve? Is it a picture sleeve, plain or colored paper? Is it one...
Vinyl records are called such because of the material Lp's (33 1/3 RPM) and 45's RPM records are made out of. Before the creation of Lp's in 1948, most records were pressed with shellac and more...
So when you put them on the turntable they can spin but stay in place.
Since your question says "some" 45s, I assume you're not asking about the large hole in the center that settles over the...
You can probably find that on one of the basic shopping sites: Ebay, Amazon, Craigslist etc. But if you cant find it there check your local antique stores or pawn shops. If you can't find it there...