I just found some JBL L26 at a second hand store. They seem to be in great condition, except one of the speakers sounds like it's underwater. I'm new to audio equipment.
stereonomono - Hi Fi Compendium: JBL L26 Decade
JBL L26
JBL L26 restoration and upgrade
JBL L26 - Vintage Speakers Review at Audio Nostalgia
SEVENTIES STEREO: JBL L26. The 6th pair I've had in 4 years.
JBL L26 restoration and upgrade
L26 - JBL L26 - Audiofanzine
JBL Decade L26 Speaker Pair L&R (LOCATION PICK UP ONLY MD 20852) | eBay