Counting saddles and shorts/bibs, maybe $300.
My favorite saddle was free, a giveaway from the LBS junk bin. Old very worn Selle San Marco racing saddle, split tail, flexible shell with thinly padded cover. Wish I could find an identical newer version, but this model dates back to the early 2000s. So comfy I don't really need padded shorts for most rides. Yet it's a conventional looking narrow road bike saddle, not a "comfort" saddle.
My other half dozen saddles cost $20 each or less, so not much expense there. I scrounge LBS junk bins and online blowout sales for saddles. Two of those half dozen saddles are good enough to ride routinely on the right bikes. One or two are miserable and eventually I'll give 'em away.
I've probably spent more on padded shorts and bibs, but I've paid only $15-$25 for shorts and $30-$50 for bibs, mostly Black Bibs, Przewalski and Spotti, which are much better quality than those silly names would imply. Well, Przewalski is a respectable name, but Spotti sounds like the cat walked on the marketing guy's keyboard to choose a name, then left a spot on the carpet.