Do Americans prefer UK or Australia?

We are an EPN (Ebay Partner Network) participant and are promoting a product (branded DIY power tool) that is very popular but not available in the US. However, we have the option of offering an affiliate link from either a UK or Australian merchant. Which do you think would work better, assuming the merchant's reputation and shipping costs are comparable?

UK mostly

for me it's UK with a British accent

i think most of the time americans prefer uk.