At the end of the game you can checkmate him with a ball in your pocket. Thats to YOUR advantage.....
If the guy is real conservative, and moves good, it's worth every bit of 10-6. You will get tired of bein stuck to the stack every shot. Your New home is there, and your vacation resort is froze to the top rail on/by/behind a ball.
If he's a strong player, decent mover, good shotmaker, it's worth less, maybe 10-8. And wont come up every game, either. But a "€Scared to shoot" guy can be a TOTAL PAIN to play this way.....
If your level of play is high enough, say 10-6 beneath professional or better, the spot aint worth the full 10-7 your playin at, just be patient youll rob him....