buy a used Ibanez ATK300. They routinely sell $200 - $300. I sold my real Stingray after playing an ATK for awhile.
Best bass value bar none. They are also super cool, gorgeous chunky solid Ash with fairly flexible electronics.
As another ATK owner (ATK305) I second this suggestion. Awesome basses that do not need upgrades or mods to play or sound good. Your $300 would be very well spent. I picked mine up for $189 a few years ago when M123 was blowing them out. Probably the best bass value for the money I've ever spent. You will be hard pressed to find more bang for the buck. Only downside is that my ATK is the heaviest bass I own, but it's still a keeper.

