My personal opinion is that it's not your GMAT that kept you out - you're right at the average for all of the schools that you applied to and they care more about Q than V anyhow. It's easy to get caught up in the quantifiable aspects of your application because they're an easy comparison point, but likely what kept you out is one of the other, intangible, pieces of your application. If I were you I'd take the time you would have spent studying and retaking your GMAT and instead spend the time and money examining the following:
1. Your story: Did you clearly articulate why MBA, why now, and why X school? Did you do it in a meaningful way? This is the number one most important step - make sure you know why you want your MBA and have clearly set your goals post-mba (aim HIGH). Also, do yourself a favor and don't make them something that's totally unrealistic (i.e., work in venture capital if you have zero experience there) that has nothing to do with what you've done in the past
2. Your essays: Let's say you had a story, did you clearly articulate that? Based on your GMAT score, it looks like quant is your strong side - make sure you have tons of people review your essays and that you spend sufficient time writing each of them. General rule of thumb is that each app should take 40 hours
minimum. 3. Your recommendations: Spend the next year knocking it out of the park at work and very clearly coach your recommenders when the time comes. I had a weak Q score on the GMAT so I created a PPT for each of my recommenders that coached them on the aspects that I wanted to highlight (for me, namely my quant and analytical skills).
4. Your extracurriculars: What do you do outside of work and why is it important to you? What was your impact? If you don't have something that jumps out - think about what's important to you and why? Make sure your extracurriculars weave seamlessly into your story. You don't need a million activities, you just need one where you make a big impact. If you want to do consulting post-MBA, try doing pro-bono consulting for minority owned businesses or something similar
5. Your interview: Did you reach the interview stage? If not, then your problem is your essays, recommendations, and extracurriculars. If you did make it to the interview for many of the schools, you likely didn't interview too well. The good news is practice makes perfect - find ways to practice. All the questions typically are online beforehand. Create either random flashcards with questions and draw them out of a pile and answer, or practice with a friend. It's really embarrassing, but you need practice to do well
With your score, odds are you invested in tons of GMAT books, do the same for MBA strategy books - I bought like 5 online and they helped me to build out the other parts of my application, especially the story. Every good application starts with a clearly defined story (where you are, where you're going, and why there's a gap between the two that demands an MBA degree)
Anyhow, hopefully that helps! Bottom line: no need to retake your GMAT, it's a waste of your time and $250.