Yes, real estate transactions are high-dollar. One real estate transaction can generate thousands of dollars in revenue. Real estate agents can be difficult to sell to as they often go with personal names or a subdomain of the agency or even hyphenated .info domains. They tend to rely more on lead generation via Adwords or Facebook than the branding power of relevant authoritative domain names. Regardless, I am hoping that in time that will change. I have dozens of city + real estate domains mostly in cities with a large Spanish-speaking population but a few...
Inmobiliaria.TV (Spanish for real estate; also have the other common term "bienes raices" in .TV)
BienesRaicesBogota.com (Bogota, Colombia real estate - metro population over ten million; capital city of Colombia, have shorter BR versions and the cctld as well)
ArriendosCartagena.com (Cartagena, Colombia rentals - tourist city and destination for cruise ships; Spanish architecture in downtown, old Spanish fort, metro population over 1 million; visited in 2012)
BienesRaicesDF.com (Mexico City real estate; DF means Distrito Federal and is what is used to refer to Mexico City; also own the "inmobiliaria version but in Mexico they tend to use "bienes raices" more; metro population around 20 million; capital of Mexico; visited three times)
InmobiliariaSanJuan.com (San Juan, Puerto Rico real estate - tourist destination for many cruises; metro population over two million; historic city with Spanish architecture in downtown, visited 1999)