I have a plastic oboe (high quality plastic, but plastic nonetheless.) and its pretty good. Its either the 333 or 330. Its the artists model.

How much do you think I could sell it for, and will buying and F. Loree make a big difference? I know that Loree is like, the top brand, but I know that Fox is respectable too.

Definately upgrade better than fox`s. I used to play on a Fox and than moved to a Loree and an amazing difference. I never touch my Fox! You could probably sell it in range of $2000-3,000 depending on shape of it and everything. Loree is regarded as one of the premier brands of oboe. Loree oboes give you a fuller sound too.