I am thinking about selling my selmer as300 eb student model alto saxophone on ebay but i want to know what a reasonable price would be for it. It is in excellent physical and playing condition and it comes with a case, neck-strap, cork grease, cleaning cloth, and upgraded swab, mouthpiece, and ligature. Thanks.

I would actually look on eBay to see how much others are selling for. I took a look and it looks like there are two for sale at around $300. You might try looking for a forum like eBay that is specific to musical instruments. You can also check out Craigslist.org.