Train tickets from Glasgow to Edinburgh or back ?

HI I have 46 46 train travel passes from Edinburgh to Glasgow. They can be used either ways and can be used any time of the year. These passes are valid till the 31st July 2012. The book comes of 50 tickets in total of which 4 have been used. Total cost of the book now is £472 and ready to sell it for £375. Will only sell for cash. call or text on 7446712609