Makes sense what you say about a possible need to return. Re. contact, Hifigo's team are quick to respond to emails and friendly (although, tbh, I've not had a problem yet with a device that required a more "substantial" conversation with them). Advanced MP3 Players have good customer service (I bought several stuff off from them, incl. my DK-4001 iems which were faulty and they replaced them for me, and our whole transaction was very professional). Still, that price issue irks me enough to go beyond UK suppliers and suffer the delay. Re. shipping cost for return, Hifigo apparently split it 50-50 with the buyer (not ideal, but their pricing remains competitive even so), but they then ship your item back free of charge. Anyway, I guess there are pros and cons, but I just wanted to raise this issue (which I've seen in the UK with other manufacturers of electronics from overseas, not just IBasso).
I was under the impression that those with competitive pricing are not authorized dealers since they are not bounded by a contract with manufacture. But either way, double check with iBasso, they can tell you who is authorized seller. Paul even mentioned before they have a link on their site where to buy it http://ibasso.com/where-to-buy/