I've honestly never seen or heard of anyone not buying something because it was cheaper than expected.
As in the perception of something listed at 600 is different to the perception of something listed at 300. I'm talking about specialized items by the way, not things everyone immediately knows the value of (like an iPhone or something)
At especially low values people start to think the item must have something wrong with it or be built out of cheap components. (Not saying yours is 'ledge, no harm relisting it higher I reckon)