What I don't understand is why do you need a broker to get the equipment from Aliexpress for you?
Why can't you buy it yourself directly? You will have to pay import tax anyway, you or who else order it for you.
My company imports equipment from China regularly, if you want, you can sent me a PM I'll see how I can help you. But I tell you now: you are getting crazy prices from other vendors because the prices in China are crazy, international freight is crazy, exchange rate is out of control and the tax system in our country is insane. So, forget the prices you see on stores from the USA, China or EU, our reality is different.