Originally Posted by
Audiofreak37
How much would I get from the cassette, brake levers, etc, that I wouldn't need and sell?
You can check eBay completed listings to get an idea of how much people are willing to pay for items.
How much would it cost to convert to single speed?
You can buy SS cassette conversion kits, I think those start at about $20. Plus you will need new brake levers if you sell your shifters
I've never seen a full carbon SS.
Look up SS cyclocross