I've been working on finishing the Bruce Chubb grade crossing boards, and I needed two lousy 91K ohm resistors to complete them.

91K ohms is an oddly specific resistor value. I headed to eBay and, sure enough, you can get them from a variety of sources. I had to order a minimum of 100, but it was only $2.50 or so, and free shipping (from China, of course).

It took about 30 days for them to arrive, but now I have plenty of 91K ohm resistors to spare. I certainly don't need 98 more grade crossing boards for my layout!