There are some coin and bullion shops in Hawaii. They are mostly found in Honolulu, which is Hawaii's capital and the largest city.

^Source

Local Coin Shops

I don't know if I will have the time to explore, but there is one that I will want to visit.

There is the Hawaiian Islands Stamp and Coin located some 20 to 30 minutes away via Kapiolani Blvd.

[//]:# (!pinmapple 21.309852 lat -157.859856 long d3scr)

Some say that it is one of the best coin dealers in Hawaii! They carry quite a selection of rare US and world coins, including ancient Chinese coins and rare, pre-statehood Hawaiian coins. I wonder if is true?

Hawaii does not have a state sales tax, but does charge a General Excise Tax. Instead of being levied on the buyer, the GET is levied on retail businesses that sell goods and services. In practice, however, most businesses pass these taxes onto the customer in the form of higher prices on gold and silver bullion products.