I buy what I find to be most comfortable, without concern for the cost. Compared to the other costs of my cycling, and the importance of a good saddle, any price is trivial.
Many years ago, after wearing out an Avocet O240r, I looked all over for a replacement. Finally ended up on the phone with a guy at Avocet's importer, who went into their stockroom and found the last saddle of its type for sale in the US. Still riding it, but have since found other saddles that work as well for me.