How much is my trombone worth?

I've been trying to find information on my trombone online to price it and sell it because I have no idea what its worth but im coming up short and cant find anything like it. I bought it in high school but only played for a year and don't have much knowledge on trombones. What i know about it: brand is L.A. Sax. Original price ~$400 im pretty sure it was new but its hard to remember. I got it in 1999 or 2000 It is very simple and I bought it as an introductory trombone. on the handle opposite the slide lock is a serial number H08582. There aren't a lot of other distinguishing marks. If you have any idea let me know. Thanks