Hi again Andrea, and thanks for your reply.
I've found similar items for sale/auction on eBay and the prices range from not very much to $100 and more. I couldn't find the exact item you have, which, from your description, sounds like a collector may pay a nice price for.
If possible, find a 'collectibles' store in your area that buys/sells old records and/or autographed memorabilia and ask how much they'd give you for it. Remember that the store is in business to make a profit, so they wouldn't pay you top dollar, as, THEY would sell it for more, but it will give you an idea, and perhaps a starting point to put it up for sale on eBay, Amazon's auctions or elsewhere. You can basically ask whatever you like, and there might be someone out there who will pay it, to complete a collection, etc. You can also try Craigslist in your city; the listing is free of charge and will attract local people, usually (www.craigslist.com)
If you don't want to sell it at this time, hold onto it and continue to keep it in good condition, and perhaps you'll want to sell it in the future.
I wish you much good luck and hope it fetches a great price, if you do decide to sell it!