Ektalure is simply a holy-grail lith printing paper. Nothing quite like it - you can get amazing warm tones, which can be toned down if desired with selenium. And even pretty heavy fog can give bright whites and clean borders with lith printing.
Even in lith, the dry down takes a lot of practice to figure out when to snatch it. If you luck out and get a good test strip, put it in a tray with some water to compare to your print in the developer.
I have 8x10 and 16x20, all purchased on eBay. The 8x10 shows maybe 1/4 stop fog (it was in the very old-school Kodak packaging), the 16x20 is pristine. Stuff holds up pretty well.
If you're not into lith, cut a test strip, even 1/8" x 2" or so. Fold it in half and fill a small graduate (100ml) almost to the brim, and "hang" the strip so half of it dips into the dev. Let it sit for several minutes with mild agitation, fix and wash, examine in daylight. If half the strip is gray, you have fog, and you'll see how much compared to the paper's base white.
If it's fogged (but not fogged black), stick in on eBay with a photo of the test strip and "lith" in the description. Someone will buy it.