$100 for an 8" TEE W/ CAP *YIKES*
I've seen where some dealers will advertise a popular stove at just a fraction over cost to get you in the door and to buy it and then make up for it with the accessories at 500x their cost. Some people when they buy a new stove from a stove shop want to get everything at the same time and be assured it is all the right stuff and will fit and be safe. They will buy the expensive pipes, you should not.