Not technically. Your best bet is to join the Sythe Discord. There's a gold buy/sell section there where tons of people post their prices. This is how I always check. It's much easier than PMing individual Sythe users.
I tend to check PlayeraActions as they're really competitive with other customers on there so it's usually updated by the hour. Then take a little off the price, as a direct sale off a sythe user will be slightly less due to PlayerAuction selling fees.