Right, I understand that the prices aren't set. I'm always looking through the consignment (more than I should be) and looking at the prices. Just today I sold some Crimson Shards/Gems for around 30~40g and an hour later, they dropped down to half that. I sell high before prices drop back down and I'll admit that. It's the only way that I, and probably many others, can make decent gold, sadly.
The problem I'm having with these shoes are that the RARE version of these shoes (EVA, HP, DEF, MOVE SPD) cost around 2,000g at +7. Now, since these are only a MAGIC pair (EVA, HP, DEF) +6, I know that I'm certainly not going to get nearly as much as the RARE pair. Unfortunately, the consignment does not have a RARE (EVA, HP, DEF, MOVE SPD) +5 or +6, nor does it have any other MAGIC pair of (EVA, HP, DEF) so I can't even come up with a proper price. It's like you said, I don't want to sell for too high or I could get undercut, nor do I want to sell for too low, which is why I'm asking for opinions as to what I should set the price. This way I don't have to keep putting the same pair of shoes in consignment (which eats at my funds) because the price was too high.