By girlfriend, do you mean that piece of rabbit fur you rub on your d*ck every night?
The LRB is only $45 through Powerscore's website. I'd say if you're getting about half the questions right - sometimes - you should give it a shot. If you're really tight on cash or something, I have a LRB that I've finished using. There are no markings in it, though there is a small tear on the front cover. I'm selling it for $25.