When I was buying last week with my Fidelity Brokerage account.... a message said, "when buying an OTCBB for 5K shares or over, you have to place a limit order". I always do that anyway, so I said, "No problem" and clicked ok.

Apparently, Fidelity does not want you to be able to buy an OTCBB at "Market" for anything 5K or over.

BTW, the order went through in about a minute.