No you do not have to visit it but if you want to maximize the chances that the listing agent to take you serious and present the offer properly you normally have to visit. 

Although I feel prepared, I wanted to take the chance to see if anyone had any quick tips.

So just by being here your chances of being successful just increased.Welcome, wish you the best!

@Samantha Lotti I've actually changed my strategy away from Pre-Foreclosures (especially after learning about the Distressed Homeowner Act in Washington state), so I didn't get a chance to use propertyradar.  

@Justin Green I believe in second chances.  

In the chance that he decides to sell, I figured this thread might become a great source for information.That being said, I totally disagree with @Shawn Holsapple and his suggestion to lie to your tenants. 

Although you may be 100% correct about these two realtors, there is a chance that they did attempt to educate the sellers on the current market. 

If you look at their overall credit history and they had always been a dead beat, the chances are that they will remain to be dead beats and will either be late on their rent or not pay. 

A newbie has a 1 and 100 chance I'd guess.   

The market has been so crazy here that my rentals are gone within a day if I even get a chance to list them.