Seward has many great shops located from the small boat harbor to the historical downtown area. You can purchase from fine Alaskan jewelry to unique Alaskan Native hand crafted items or locally designed arts and crafts. The prices are relative to Anchorage prices. To name a few I enjoy regularly:

Ranting Raven Bakery and Gifts for a good selection of the unordinary- Creator of our new outdoor wall murals depicting the history of Seward.http://www.trailriver.com/rantin_raven.htm
Starbird Studio offers all wildlife creations- http://www.starbirdstudio.com/
Resurrect Art Coffee House Gallery for the unusual-
Brown & Hawkins, an original Seward store with a good selection of gifts and clothes- http://www.sweetdarlings.com/
Urbach's, another original Seward store with good warm brand name clothes
The Alaska Shop for a nice variety of gifts-
Once in a Blue Moose, a new place with all the good tourist do dads-

. . . . . and there are more