I've wained on my feelings toward REI over the last couple of years. I joined in the early 90's because I was doing a lot of rock climbing at the time and it was a great place to buy ropes and other gear. In the early 00's I started getting back into cycling and they actually carried a pretty good selection. Over the last 3-5 years though their cycling stock has gone way down to the point that I don't even really look at them anymore.
That being said, right now they have some great deals on Brooks saddles. They have C15/C17/C19's and several leather saddles under $100 and C13s (all 145mm) for $131.19. Outside of ebay, I've never seen a C13 at retail for under $190.