Supply and Demand , we all know that. I have a Rogue Hera pre that runs 8 Russian 6H30’s, I wish I could afford 8 of those little NOS babies. First world problems are the best. I went through the vintage kick about 15 years ago at the MidFi level. Bought Dynaco tube gear, Marantz and Sansui SS, JBL and Klipsch speakers. For me it wasn’t as Golden as I remembered, gave it to the kids. Regards , Mike.