Radiolovers.com - OTR
This is a great starting point if you've ever thought about starting your own OTR collection.
You want to really get into it, this is a great website.
If you want fully restored, high-quality OTR, it's pricey, but well worth it. They own most official licenses.
Big Band Info Page
Want to know more about Big Band? Check this out!
Good place to collect tons of used CDs and DVDs.