6 mohth listing runs out. Now what?

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I listed a home for sale, nearly 6 months ago with a local realtor, who I have worked with before.  Moscow House.  Now my listing is up.  I am not at all happy with the marketing, too high of a starting list price for area and square footage, and have to make a discussion on whether to extend my contract.

What do folks feel about changing realtors/brokers when a listing runs out.  Has it helped, hurt or had no impact.
Thanks all.