My guess is that there are more speakers for sale because there are more speakers made. Other audio components have to take a back seat in manufacturing. And after all, most systems have two speakers or more--so they must be the most important thing! They certainly take up the most room. And what does the plumber say when he visits your house to fix a leak and hears your system playing? "Hey, those are great speakers!"
(One exception: if you have a Shanling CD-T100 CD player he will ask you how much that cost first.)
Photon and the guys are right, a heckuva lot of folks try swapping speakers as a remedy for unsatisfactory sound before they go upstream. And the same number of people have unsatisfactory sound in the first place because they spent a wad on highly revealing speakers, then "matched" them with a lesser source, one with faults for the speakers to reveal.
(One exception: if you have a Shanling CD-T100 CD player he will ask you how much that cost first.)
Photon and the guys are right, a heckuva lot of folks try swapping speakers as a remedy for unsatisfactory sound before they go upstream. And the same number of people have unsatisfactory sound in the first place because they spent a wad on highly revealing speakers, then "matched" them with a lesser source, one with faults for the speakers to reveal.