There's a catalogue, Facit postal IX, that prices every cancel...
Klintehamn isn't rare, and it's listed at SEK50, which is slightly over minimum value.
There are of course, as Floortrader mentions, collectors of various area's and cities. As there are for every country.
however the Swedish postal service has always been known to have placed cancels better than most other countries. This means, especially with the decline in collectors, that there are LOADS of this kind of material on the market, and that collectors always aim as high as they can, since there would be lots of better stamps to buy, they will do so.
this stamp has poor center, and a cancel that is only partly visible, and not placed to most collectors liking. This stamp would not fetch any kind of premium in Sweden, it couldn't even be sold as a single. on eBay
it could perhaps sell, if you list it really low and your shipping is cheap/combine and have other items someone wants.