I change LCDs, keyboards, add memory and do virus removal. Most computers are not fixable on the spot. Parts are usually always have to be ordered. I will order most all parts and you, the client, would pay me when the job is done. I'm willing to come and pick up the computer and meet you when it is finished.
Any part that is over $50.00, the customer would have to pay on circumstances, an ordering fee. Most times, it is not.