I'm cleaning out the astronomy closet, and I hate to throw anything away that someone can use. This is a dovetail bracket from (I believe) a Celestron Star Pointer Model #51630. It probably came with a NexStar 5 I owned for a bit, and I'm not sure why I ended up with a second bracket.
Anyway, if you can use it, its free + shipping charges. Small packet USPS Express Mail in the continental US is about 4.00, or you can send me a Self Addressed Stamped envelope and take your chances with 1st Class mail.