Nice old kit! I'm a little partial to old Slingies since that's what I've got myself.
I don't think they're jazz sizes. The 20" bass on my '56 Slingerland kit has 8 lugs. The drum in the pic has 10.
There's some more info you'll need to provide to get a more accurate appraisal:
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[*] What size are the drums? Measure the diameter of the shell, not counting the metal hoop.
[*] Does the kit include a snare drum? What kind? Single-ply Slingerland Radio King snares can be quite valuable. To see if that's what you might have, you'll want to provide some close-up pictures of the snare drum, particularly the snare mechanism. (And besides, we like looking at 'em.) :)
[*] Look really closely at the top side of the cymbals to see if you can find any marks stamped into them, as well as irregular dimples that could indicate the cymbal was hand-hammered. Since certain cymbals (like the old Zildjian K's Jonni hinted at) can be worth quite a bit of money, it's worth getting a positive ID. Again, good pics would be helpful.
[*] Have any extra holes been drilled in the drums for new mounting hardware or whatever? Drums that haven't been altered carry a price premium.
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...and possibly the most important question if you're trying to sell locally: Where are you? You could probably get a good return if you're in a major metro area, but here in rural Podunk, there's not much of a market for vintage drums.