You really don't need a tube tester to enjoy your amp.
Just buy from a reputable vendor. Matched pair power tubes in your case. Keep a spare of both power/preamp tubes. Tubes, especially the preamp tubes, generally are reliable, They futz out after a long time in service(years)
$150 will buy you a $150 worth of nothing useful. That could buy nice tubes. The tester a reputable dealer uses is not like a simple hand held VOM.
Just buy from a reputable vendor. Matched pair power tubes in your case. Keep a spare of both power/preamp tubes. Tubes, especially the preamp tubes, generally are reliable, They futz out after a long time in service(years)
$150 will buy you a $150 worth of nothing useful. That could buy nice tubes. The tester a reputable dealer uses is not like a simple hand held VOM.