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do you guys know any dealers in Los Angeles/Orange county area?
No, not specifically. Check the phone book for that area or do a Google search for "Los Angeles county" and "coin dealers". Both of these should turn up several shops that deal in coins and bullion.
If you can't find one that looks good to you, do consider the on-line vendors with good reps, such as APMEX, Provident Metals, and SilverTowne. Many of us on this site have used these dealers multiple times and have done well with them for the most part.