Collecting Rubik's puzzle is a hobby, you need to know your budget and look at some collections. For general info on cubes look at Sandy's site twistypuzzels.com and for more collectors, see my favourites collectors info. This is also a great discussion forum where you can post your questions about twisty puzzles. Most of the puzzles you can buy via ebay, but for special puzzles you would need to trade or the visit the yearly Cube day in The Netherlands or the IPP or visit the International Toy Fair in Nürnberg . For puzzles solutions look at my friends site Jaap. For puzzle building look at my pages or twistypuzzels.com