I have quite a few NOS Potter Co. model GMP 50-1 .1 mfd -- 5 KV Oil / Glass (Plastic?) Capacitors for sale. They all appear to be NOS and in very good condition. I see them on Ebay for about $25 - $30 each, so I'm thinking $10 each is a good price for them. I have quite a few available. You can contact me off list at
sndtubes@vacuumtubes.com73
Mike WB0SND