Any dealer worth a dam wouldn't be charging customers anything for a detector they cant produce. The vast majority of dealers are simply keeping a list people who want it and when their distributor calls to say "I have 5 available for you" the dealer calls the top 5 people and says "they are ready to ship, it will be XXX dollars".
I know of at least one dealer who had customers actually place orders, along with payment info, but the cards aren't charged yet. When the dealer pushes a button on the first 5, they get charged and the detectors go into the mail.
I know of one who actually took peoples money
and those poor customers are just waiting month after month with no merch (and likely losing out on credit card protection coverage). This is also a company I have huge reservations about and would never order from personally.