Is there any point in ordering a sample if the The lot's MOQ (minimum order quantity) is too high?

 Yes! MOQs are often negotiable.

While producers set MOQs to cover the higher costs of processing and shipping smaller batches, many are flexible once they know you're interested:
If part of the lot is already sold: The remaining MOQ can often be lowered for your order.
If the lot is entirely unsold: Producers may agree to lower the MOQ, sometimes in exchange for a small price adjustment per kg.