I was working on the side of the road in Westchester County, and I find a Continental Competition tubular tire! Closer inspection revealed a broken valve core. The base tape is in perfect shape with no glue (weird), perfect tread pattern with no measurable wear, and no rubber cracks or slices on the casing.

SWEET!!

So, 10 minutes this AM with a drill, tap, and a core from the parts bin and I am in business. Yay! I've got it mounted up on a rim and it looks like I really lucked out. It seems to me that someone had it as a spare to limp home, and they broke the core during inflation. Talk about bad luck for them but good luck for me.

It seems like these things retail for anywhere between $60 and $100. Nice spare.