Need advice with my LP'S/12 Inches

[Chala]

I need to sell my vinyl collection (Disco 12 Inches and LP's 75-79 some earlier) in a hurry, and I am not sure how to go about it. It's only about three to four crates. I have no idea what to charge, nor do I have any idea if I am undercharging if a record is a rare hard to find, or in demand. I did not put them on e-bay, I went straight to craigslist. I have no time to inventory or anything. I had seen a guy on here selling his collection on e-bay for $5.99 a pop, seemed like both LP's as well as 12 inches, so I am going to try that. My collection is in storage, and I will just invite them over to take a look, and whatever they want charge them $5.99. Being that I am in New York City I am hoping that I will get a few folks that are interested. I don't want to give away a rare find though, any suggestions? Thanks all!