That is simple geographic arbitrage; a common business model, not even "fraud". It may, at most, be a breach of some companies T&Cs, but breaking T&Cs is not normally a crime.
Fulfilment of the warranty is the fraud when the vendor goes bust. Whilst a contract is with the vendor and not the manufacturer, when the vendor goes bust/closes/stops trading, the warranty obligations transfer back to the manufacturer. So its a fraud because the manufacturer could refuse to meet any warranty obligations especially if they can prove it was a product sold in an over seas market and not the local market. This does happen, but its complex.
Whilst its not fraud, the fact anyone including the former directors of now deceased company can also appoint their own liquidators, and liquidators generally work for who ever is paying the bill, it is all but fraud in name.