GMAT Strategy

Today I took the gmat and made a horrible 380. I need a score of 450 for admission into my local university's mba program. The problem is everytime I take the test either quant or verbal will soar up while the other drops, and they end up just offsetting. For example on the last test I scored 28 in quant and 19 in veral and this time i scored a 13 in quant and 26 in verbal. This go around I ran out of time on the quant section and guessed at the last ten and didn't answer the last 2 of the 10. I'm considering taking the kaplan classroom course. Has anyone taken this course and is it worth the money. Would someone that started with a low gmat score and improved with kaplan classroom course please respond back to this post!!! I would really appreciate it before I shell out $1500.

Thanks