This qualitative research aims to study opinions, expectations and all factors that have an impact on consumers and casual investor's decision to buy a downtown condominium in Bangkok. This research was conducted by interviewing consumers who have purchased a downtown condominium within the past six months. A total of fourteen people interviewed were divide into two groups. The research found that all of them had an implicit expectation for a profit, and the condominium's image played a key role and positively related to the purchase decision. In addition, it found that investors made a quick decision based on quite clear criteria, such as a condominium project being located in an area where new projects were very unlikely, the project developer has a high credibility based on experience, the project had a limited number of units, or they knew about the project before anybody else and had the opportunity to select and secure interesting rooms at comparatively lower prices. On the other hand, those who purchase a condominium for residential purposes would consider several aspects of the project in detail and expect to see the real room before deciding to buy because they want to make sure that it is the best project and best room available.