It was not really a high-end JBL, but one of the better mid-tier models.
The TLX tweeters are pretty decent and IMO don't really give up much compared to the higher-end titanium-dome tweeters of the time. The biggest downside of the TLX tweeters is the brittle plastic frame and especially the plastic piece in front of the metal dome. They also lack the protective screen over the tweeter that other dome tweeters like the 035ti have, making them a tempting target for little-kid fingers. For those reasons, it's actually pretty rare to find a pair with the tweeters still in pristine condition, but if yours are, that's great.
The mid and woofers are a bit lower quality compared to top-end JBLs but again not really that bad. In this case the speaker benefits additionally from being an actual 4-way design, so each driver in the system only has to handle a smaller fraction of the audio frequency spectrum. The tweeter doesn't have to reach too low. You have an 8" acting as a mid-bass woofer between 200 and 800hz, keeping the mid-bass clean regardless of what your main woofer is doing. Fairly similar crossover frequencies compared to the JBL L5.
They are 4 ohm speakers. That shouldn't be a problem, but if your amp is tiny or has issues with low impedance loads then it might be a factor.
I think that they would be a great set of starter JBLs if you don't have any yet. I think that $275 is maybe on the high side. I would say that $200 is probably more of a fair price for these, but if they really are in exceptional condition, and JBLs don't pop up very often in your area, then $275 wouldn't be a huge stretch I guess.
https://manuals.harman.com/JBL/HOM/Technical Sheet/JBL940 ts.pdf