Are MintBuilder or BullionExchanges reputable sites to buy from? Im going crazy trying to find a 1/10 ounce gold eagle and they have the best price with a 10% premium

Reddit: r/Gold reports: Are MintBuilder or BullionExchanges reputable sites to buy from? Im going crazy trying to find a 1/10 ounce gold eagle and they have the best price with a 10% premium. Full body text was unavailable at ingest time, so this brief is based on headline context.