Hence, my suggestion that they initially limit it to one unit per customer, so that ....
So that it takes ages for them to deal with all the order handling, shipping waybills, invoicing, payment follow up?
I think they'd rather have 20 customers that take 30 units each than 600 customers that take 1 unit each
Heck, I'd place an order for 30 units if I could pay with wire transfer...