Not sure if this was directed at the OP. If they are not a Costco member, not sure how it is going to help.
Full disclosure: I am not a Costco member.
EDIT: If OP has an extra $5 and is in no rush to lease, they could sign up for a Penfed membership. After 60 days, they will be able to generate a savings coupon (certificate) for additional savings. More info can be found here: PenFed Benefits - Up to $2000 BMW Volvo MB FCA Mini (usually $500 towards leases).