How narrow are your neighbourhood boundaries, and are the studios reasonably similar in size? Even nearby buildings may appeal to different buyers. I would also separate new listings from units that were withdrawn and later returned, otherwise the apparent marketing period can be misleading.
A recent pricing discussion raised a broader question: how much of a Bangkok transaction should be mapped out before anyone starts negotiating the headline figure?
Financing time, evidence for the offer, control of documents and the role of each participant can all change what initially looks...