About Us

When Howard Markham was a boy, he would tag long with his  dad who collected coins . with his  Dad’s encouragement he started his own collection.   during college he stated working for David Hall as a coin buyer.  and as a coin grader for PCGS  which  gave him unparalleled knowledge of coin grading.  Being in the coin business  for over 35 years has giving him a lifetime of knowledge . We are the Preferred PCGS Coin Appraiser for Attorneys , Superior CourtsApproved Expert  !!  Better Business Bureau accredited  NGC  Coin Appraiser. with an A+ Rating for the last 35 years.. Markham Numismatics has traded, purchased and sold millions of dollars in PCGS coins and NGC coins , He worked for David Hall when he started PCGS in 1986. Markham Numismatics has built a extensive network of coin collectors who are waiting to buy PCGS coins and NGC coins.. If you have PCGS or NGC coins and wish to liquidate them. please call for an appointment.   we also provide  Coin Appraisals .    please email us with questions and you can even set an appointment .


offices in: 1-800-953-3027


Palm Desert, ca

Diamond Bar ,ca

Rancho Bernardo,ca

In Home Or Bank Appointments available throughout California


Markham Numismatics.

Our Offices

Riverside Office

By Appointment Only!

Markham Numismatics 5225 Canyon Crest Dr. Riverside, CA 92507
(800) 953-3027

Rancho Bernardo

By Appointment Only!

16870 West Bernardo drive suite 400

Rancho Bernardo, ca 92127


Palm Desert Office

By Appointment Only!

74-710 Highway 111 Suite 102
Palm Desert, ca 92260

 New Office in Diamond Bar  909. 378.4745  to serve my home Town of Brea and surrounding area 




If you need a coin collection appraised or wish to have us liquidate your coins . email or call us.
to set and Appointment .  1-800-953-3027