Bargain prices and low interest rates have combined to escalate activity in the Las Vegas residential real estate market. The number of residential properties in the valley available for resale is just over 6,000, down from a recession-era high of 22,000 properties, according to numbers from the Greater Las Vegas Association of Realtors. Here’s a look at some properties that are or have been listed for sale under $150,000 in the Las Vegas Valley.