I'm going to say something you will hate to hear...if you don't have the option to find a job or sell off things you don't need you'll have to wait. I went through the same thing when I was younger for other hobbies. You just have to take advantage of what comes your way. Ask for them as gifts, or ask for money when the time comes. You might be surprised how or when an opportunity comes up to make some cash, when it does be ready to pounce. You're young though, you'll get your chances.
Depending on your personality either stay away from this website as it will make the need for the new to grow stronger, or if you can handle it stay here and learn.
Make priorities for your next buy. One nice aspect in your situation is how much you're going to appreciate your next purchase or acquisition.
One last thing to scratch your itch, go to the store and try them out. Give full wearings from their testers, enjoy it the free way.
You could even ask for samples from the store, or if you're at all interested in niche there are houses that will send out free samples upon request (there's a whole thread about it here
careful though, you don't want to get hooked too early and have the more expensive stuff out of reach...)
Hope that helps.