It seems to be a general question about sales price per SF in Arcadia. Recent Sales of Price per SF will greatly vary depending on the type of home, the location, the school district (some part of Arcadia are not within the Arcadia School District), as well as layout, conditions, age, etc. With that in mind, the recent closed sales range from $300 to $600 per SF.
In order to get the answer you are looking for, you may want to ask a more specific question such as: What's the average market sales price per SF on Single Houses in the average size of X SF, Built within the last X years, in the X area of Arcadia, within Arcadia School District...
As a Realtor resident of Arcadia since 2001, I would like provide you more detailed insight of what you are looking for. Please do not hesitate to contact me with any questions you may have.