All depends on what you want. The 300 is a great machine and anything from like 93-2000 are all the same.
As for other models, for the price range you want to pay you're looking at older machines so they all will have carbs, straight rear axles, etc, so the size is all you really need to decide about, and anything will be a good machine.
As for other models, for the price range you want to pay you're looking at older machines so they all will have carbs, straight rear axles, etc, so the size is all you really need to decide about, and anything will be a good machine.