There are several small boutiques and also restaurants & cafés in the Old Rauma area. There are for example antique boutiques, clothes, art, jewelry, flowers... and the market places which is open daily until 14.00 and some summer it's been open until 16.00. I don't know about this summer yet. And in summer time there's also been the evening market in certain days. Near Old Rauma there are also several department stores and other bigger shops.
What to pay: The prices in Old Rauma seem to be higher than in local department stores. For example if you want to buy clothes, I'd prefer department stores or some boutiques that are not in Old Rauma. On the other hand, you should support the ones in Old Rauma or they will move out and soon there won't be any shops left at all. :(
Turn right and at King street you can do some shopping
The Pentik shop is tiny but romantic looking where are displayed pottery, tableware and other decoration items.