No Sellers willing to do COD anymore???

I first got into this hobby about 4 years ago (at least in terms of owning "high end" equipment).......one of the main ways I was able to do that was by buying almost everything used. My speakers (B&W M802's) I found used at a local audio dealer, & after that, bought most of the rest of my system from private sellers thru Audiogon, always doing COD, which seemed almost SOP at that time.

Now, most sellers INSIST on Cashier's Check upfront, end of discussion. And I admit, when I'm selling items long distance, it would be nice to be able to impose that, but the last time I tried that when listing something FS, no one was willing to do that. Am I missing something? Would anyone ship their expensive audio stuff to someone just relying on their word that they'd then send them the $$$?? It seems too one-sided now......even with all the potential pitfalls of COD; at least it's sort of equal for both parties. Thanks for any input!