How long do speakers last?

I just re foamed my pair of Bose 301’s that were bought in 1977 and they still run great. I use them for my front surrounds in a second tv room. This also includes having them in a garage setting in northern Wisconsin for 16 years as well.

Insanely good  price and they sound fantastic? -- I can see why your are worried.

Another vote for Bill Legall at Millersound. A wonderful man with a lifetime's experience repairing speakers. Not just surrounds, either, but spiders, voice coils, everything. Very reasonable prices, too.

I have a pair of Polk Audio Monitor 10's that I bought brand new in 1987 that are in mint condition and sound like they did the day I first hooked them up.  Never been opened up or worked on and all original components.  They have always been in a non-smoking house, and in a room that is always used (so well ventilated and climate controlled), which I believe is more important to speaker longevity than the occasional "cranking them".

I have a pair of Mirage M760s I purchased as demos in 1986. They are still in pristine condition and sound fantastic.