While cleaning my basement i found a box of nos GE tubes. Mostly 6l6, 12AX7s and 12AU7s. Most look to be new, never used. I know very little about tubes so I have no clue how to test them other than run them through my tube guitar amp. Looking them up online they seem to go for $100 A piece for the 6l6s and about $75 for the 12ax7s. Certainly a nice find !