I have "inherited" approx. 600 7" 45 RPMs

Bad news: There are relatively few 45s that are worth anything, especially if scratched. Good news: Ones worth something, depending on condition, include older 50s and 60s rock and roll, jazz, rhythm & blues. Some 45s with picture jackets have value, such as Stones, Beatles. There are reference books for 45s that might help.

I have no room for 600, sorry.

Thanks for the response. I have more than 600. I am willing to split and sell individually, but I see this could be a project. The records are not from a Jukebox or anything. They are from my Uncle's collection when he was younger..perhaps he played them a few times each. They don't take up much space as most are in about 8 or 9 45 RPM storage boxes, which are about 8"x8"x 5"each. If they are not scratched and clean, I suspect they will be somewhat desirable for an owner of an old Jukebox...LOL
Thanks for the responses.

Any place I can view titles you have for sale?

I think their value will be greater to collectors than to audiophiles in general.

Getting the best value out of them as collectables will require an investment in time and research.

I am not an expert but I suspect what GEoffkait said regarding the types that are likely to be worth more is true.

I'd be interested in knowing what you have, once you have them all listed out.

I'd probably try to categorize them into groups representing relative estimated values. Once you've researched prices of all in each group to your satisfaction, you can put those up for sale.

Just based on #s, 600 45s from over the years in good condition generally is likely to have significant total value that might justify hiring an expert to help assess and maybe even sell that would work off a % of the actual sale.

IT really depends on your time and availability to do it right and how much you need the money today. VAlue will probably only go up as collectibles over time, so not harm in holding on to these until the time is right to sell properly.