With respect, clearly 500 were made. So not that rare. Probably worth a fair bit to the right person but very difficult to say exactly. If you want to sell it, I'd suggest sticking it on ebay with a low starting price and hope for the best. There doesn't seem to be a huge amount of money in cricket memorabilia at the moment.
Please don't think I'm suggesting that you are trying to or will try to sell it here, but just FYI, there is a forum rule in place here which requires a minimum of 50 contructive posts to be made before anyone is permitted to sell. It is mentioned when you sign up but it is often overlooked, so knowing that now may save you some time and trouble.
Welcome to the forum.