Doorknob Capacitors

My first batch of doorknob caps arrived today from the Ukraine.  I will using
them for various antenna tuning projects. This particular batch are 100pF. I have
several more batches coming from the Ukraine and China. I won several eBay auctions. 
By the time that I am done the collection will average about $1-$2 each in values
from ~30pF to 500pF.