I had to wait three days from the time I found it till I could buy it this morning! It's not the best example, it has some rust around the lugs, but it looks to be all original, with exception of the rear rim. It fits me just fine, with about an inch of standover clearance for my boys.
Here's what I can find on it:
Nishiki Sport Series Olympic 12, lavender and white color scheme (kinda gay if you ask me, not that there's anything wrong with that )
Serial number is WG00603, which would be the 603rd frame built in 1987 for US market.
Infinity Tange Tapered double butted Chrom Moly frame made by Kawamura.
Maillard front and rear hubs, front hub being high flanged. Stamped with 37 86, and 41 86.
Maillard skewer on front wheel, unknown skewer on rear.
Shimano SLR side pull caliper brakes with Shimano SLR hooded brake levers.
Shimano SIS Light Action shifters, indexed rear, friction front. Mounted on downtube.
Shimano Light Action rear derailleur, Shimano front derailleur.
Shimano 6 cog freewheel, twisted tooth.
Sugino VP 175mm crankset with 50/42 gearing.
MKS pedals, missing one plastic foot cage.
Mistral M13L front rim, 36 hole, hard anodized gray.
MAVIC MA2 alloy rear rim, 36 spoke. (not original?)
Let me know what you think! Yes, the price was $15. I hope East Hill can tell me more since she appears to be the Nishiki diva!