I Buy Houses signs in Houston? What are they all about? Are they Real Houston Cash House Buyers? - You might be driving by thinking are these guys real Houston Cash House Buyers? If you call that number will you actually get a cash offer from a Real Cash Buyer? The Answer is Yes! These signs are called bandit signs and investors have been using them for many years as a way to find sellers with dumpy homes who want or need to sell fast. At 713PropertyBuyer.