I'll always go and see something, but making an offer via text, PM, etc., lowball or not, is a HUGE timesaver if you know your mental price. I recently picked up a new game and texted the guy something to the effect of "hey I'm ready to buy but my cap is $X depending on condition". He replied "sounds great", then i went over and we worked out the final details after checking out the game. I'd hate to drive without knowing if my offer is going to land close or not. Just my preference though!