Let's see:
(1) Avocet 3 ($25, 1975)
(1) Fuji America ($15, 1977)
(2) Selle Italias, new ($30 x 2)
(3) Selle Italias, used, various brand names ($15 x 3)
(3) Specialized Body Geometrys ($35, $80 and $100)
(4) Terry Flys ($120 x 4)
Chamois Fat ($10, $15 and $8)
Bag Balm ($8 x 3)
Sub total - $890
I have two custom seatposts (for setback to offset steep seat tube angles that allow a more forward wheel position). I won't add those costs here but for each, I had a titanium post instead of aluminum for comfort so that is another $100 per post.
So $890 + (2) x $100 = $1090. I have a grand butt. (Wish I kept the receipts.
)
Edit: this isn't entirely right. Those seats have carried me over 200,000 miles so even if I spent $0 for "comfort" I would still have had to buy, what, 8? seats just to not be sitting on the posts.