Sometimes shopping on the net is cheaper than going to a mall. One interesting web is Ebay. You can find in it a lot of used products very cheap. For example, I'm searching the CD's of the complete Beatles collection. I haven't found the CD's but I'll buy a collection of 19 Beatle's original vinyl LPs that costs 217.50 € plus 4€ of transport.
In Ebay you can also buy electronic products like DVDs players. I have bought one that can read Mpeg4, MP4, DVDs and SD/MS for only 21.99€, but the price I have to pau to deliver the DVD player to my home it's almost the same: 20€!
When I want to read some book I don't buy it, I go to he web of Diputació de Barcelona (diba.es) and I search it in the public librarys net. It's easy and free!