Loudspeaker warranties and black market products

I’ll kick off the comments. I have not bought any loudspeakers on the re-sale market that might be subject to a possible warranty. I have bought mostly vintage loudspeakers from sites like eBay. One such purchase was a pair of Dahlquist DQ10a’s, which I owned new in my youth as a high school junior in 1975. I blew out both woofers in the first 10 minutes. Lol. That’s on me. I recently purchased a set of JR150 loudspeakers on eBay, which are the big brother of my beloved JR149’s that I owned when I was in college in 1979 thru my first years as a professor at University of Illinois in Urbana in 1993. A true workhorse and I’ve no issues with the JR150 set. 

Warranties are mostly useful in the first weeks or months of ownership where manufacturing defects are usually revealed.  After that, speakers should last for decades, unless they are abused.  Those who blow out speakers from playing them too loudly don’t get much sympathy from me.

The most important part of my speaker system is a compression driver that is close to 90 years pld; the warranty has probably expired (and the company too).  The rest of the system is nearing twenty years old.  I don

Black market products are stolen products, as in "It fell off the truck." Gray market products are trans shipped products sold by resellers with no warranty, or products purchased from another country that are not supported by the local distributor. And black listed products are a whole other thing.

Generally agree with @larryi - if a speaker is well designed and not abused, the chances for a warranty need are exceedingly small.

As a buyer, I honestly care very little about warranty. My concern is for out-of-warranty service - whether it’s because the warranty period lapsed, or product was bought 2nd hand, or via gray market. Will the manufacturer make replacement drivers available for purchase at reasonable prices? Because that’s what makes or breaks the long-term viability of a speaker. 

In fact, if I’m buying high-end expensives speakers new, I’ll absolutely want to purchase and stash away some spare drivers. I’ve acquired spare drivers for my Tannoys over the years, but it wasn’t easy nor cheap - even though I was a buyer from a proper authorized dealer. 

Black market indicates stolen or illegal goods (ivory speaker cabinets, opium infused woofers, etc). I think you menat GRAY market ;) 
I generally have no problems buying gray market if the seller doesn’t seem too sleazy and the risk / reward calculation is good.

In my mind, a good manufacturer will service their producs (for "reasonable" fees) no matter the origin or warranty status. VAC is my gold standard of this so far. Rogue Audio is also excellent. Tannoy - oof, they’re a bit rough. Even since before the Behringer / MusicTribe acquisition.