lots of people recommending good places for run-o-the-mill (nothing wrong with that) PCX is a favorite of mine for higher end kit when i'm not buying direct from the manufacturer and they have some decent sales. for silver wire and other bits including tubes, chassis etc. check out vt4c.com. great prices on decent but not uber quality silver, teflon, silk sleeve, NOS tubes, transformers connectors etc etc. the 4N silver (not cryo) price cannot be beat IMO, never seen it matched anywhere apart from buying direct from the manufacturer