I checked the Customs website
, and the only related thing that's a restricted import is "Woolpacks used for the storage and transporting of greasy wool or scoured wool.". You're not wanting to buy greasy wool, I assume.
Apart from that, "All goods (except for tobacco products and alcoholic beverages) may be imported duty and tax free if their value is $1,000 or less." So it's worth making sure you buy less than $1000 worth at a time