Unless you are a reseller looking to possibly establish a potential supply line, thirty units is not likely to be considered a bulk order from a large manufacturer.
If you have some type of business license, you might fair better than retail through a wholesale distributor, or at least that is how it often works here in the states.
Down at the consumer level, thirty units can be a decent size order for a retail vendor. If utlimately forced to go the retail route, still inquire about a volume discount before purchasing. You might be surprised.