Tubes becoming hard to get?

"Or just responding to market conditions based on future supply issues and increased costs....just like gasoline. "

We are paying Scarcity Rent in economics term. 😉

Try ‘The Tube Store’ (the tube store.com) then.  Prices and availability seem OK 

Yes all are right price is increasing but made in india tubes are still cheaper than others but it's also increase approximately 20 to 30 percentage 

Slovakian and Chinese manufacturers will fill the void, nature abhors a vacuum..

I only use small preamp type tubes that last thousands of hours...such as 12ax7, 12au7, and 5751's...which I have plenty of in reserve as they were all bought several years ago. So not really effected by it.