Having your own printer will probably save you money in the long run if you need to print lots, particularly if some of that is colour pages. Print credits in uni are like 5p each but if you want to print colour I think in the library it's a lot more than that isn't it?
Also it's a lot more convenient, as there's no waiting for someone else to finish printing before you can. I wish I'd bought my own printer, and I probably will next year.