I'd definately buy new on sheets and covers. Although I did see some cheap ones on ebay that were new. Will be keeping an eye out. Or, a tip my sister gave me and I didn't use lol, was buy a big flat sheet (you can get them cheap from ASDA) and cut them to size for the cot. I ended up doing it when my son went into his toddler bed though and was really easy to wash etc. xxx