When writing the description we used to appeal to the sales agent (pre-internet), fortunately we now appeal to the buyer

Don't underestimate the value of the description.  Imagery is huge but the description ties it all together

Test, different approaches (change description with the passage of time), small tweaks are fine

Say the most you can with the least amount of words

Avoid being too flowery

Talk about the features while slanting toward potential target

Use headline analyzer for lead sentence

Use pictures to help with description

Ask current owner what caused them to purchase

Think of those things that may cause the next buyer to act

I believe description changes may cause some status changes with different search engines stirring activity