Bag Help!!

Happy New Year Everyone! 


I need some help, i am after a new bag for sixth form as the one i am currently using is falling to pieces. The style i am after is a long shoulder bag and big enough to fit files, books etc. in. I've searched eBay and it's being no luck to me today and even some of the high street websites have nothing on them. 

So if anyone knows anywhere good to buy cheap but nice bags let me know asap! 

Thanks x