Ok i have never transfered a domain. I am selling my domain so how would i go about transfering it from my account on namecheap to someone elses account on goDaddy?

Just have the person initiate the transfer from godaddy.com. Make sure the admin and registrant email addresses are up to date and also make sure there is no lock on the domain

ok thank you. that was a big help.

Does anyone know how long it takes (usually) for a domain to transfer.

4-7 days is the average from my experience