I really like the sweater shop right off the pier at Kilronan. They generally have a good variety and the prices are as reasonable as you're likely to find anywhere else. Sometimes I have found good sales there as well. There's another shop that sells sweaters, blankets, and other wool items and it's located up by the big fort. If you really want to bargain then you can check both out before making a purchase, but the prices aren't really that different. I prefer to buy my sweaters from the islands because that's where a lot of them are made.
What to pay: Around $40 for a basic, one color, sweater. Sometimes you can get a deal that's around 2 for $60. Usually cheaper than what you can get them for here in the U.S.
Spar: No need to stock up on supplies
You might think that small island off the coast would only have a few foodshops with sky-high prices.
Thankfully you would be wrong, as Kilronan has a branch of the SPAR supermarket on it's doorstep.
It sells all the usual stuff you would expect, but also a good range of non-food products and a very useful sandwich bar.