Textbooks >< Chemeng ones are usually in the region of £50, and to be honest they're often not that necessary. My class tends to share all our books. You get all the info you need from lectures and notes; our most frequent use for textbooks is to look up data about various properties. We don't have set textbooks for any of our courses, though I do have a few that I bought to help me out. Atkins' Physical Chemistry, Elements of Chemical Reaction Engineering, and Mathematics for the Physical and Engineering Sciences.
Fortunately my friends and I all got firsts, so we're each getting a copy of Perry's Chemical Engineering Handbook. This is the chemical engineer's Bible and it's a massive brick - we're all going to use it as a doorstop. But it does contain everything you'll ever need to know about chemeng, as well as thousands of pages of data. Need to know a typical value of the heat transfer coefficient for a condenser with water on one side and an evaporating C4-C6 hydrocarbon on the other? Perrys can tell you!
Mostly, though, you don't need to buy many textbooks. 'Atkins, Felder & Rousseau and Perrys' will get you through four years of chemeng xD
I'm not in school anymore, but the best thing I have ever bought was a Pottle. It is a pot/kettle. You can make just about anything it in, I used it almost every day when I was away at school, whether it was just tea or dinner. Definitely the best invention ever.