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Well, putting a hard value to these is tough. Most people don't consider Japanese drums "collectible", hence the hard part. Those appear to be, judging by the lugs, mid-late 60's. The best part is they are honest to Pete Pearls, and not one of the stencils. As far as a real value, they look to be in really good condition. Have the edges been re-cut, or has anything been changed on them? If the edges are rounded over, then for sure they are original, if they are cut, a good photo would be in order to determine if they are factory cut or not. I have a stencil Pearl that is a copy of a Slingerland with the old style stick-saver rims. It is a [B][I]single ply with rings[I][B], and the edges were cut, but looked like a kid in high school wood shop cut them.
If you could post a few more shots, closer in and focus on some of the hardware, maybe pull a head or two and get a good, clear shot of the edges, it would be easier to estimate. That said, if all of the stands and cymbals appear to be original, they would land somewhere in the 300 range, max. Unless of course, you run into someone who collects only Pearls, then you might get a little more. If you are thinking of selling, let me know, those are nice looking drums.