You live in the UK. You are looking for various items with various prices, searching for the best price with consideration to many other features. You would like an automated process (in other words quite simply a script to do all this comparing for you).
You are in luck, sir. You have just discovered the power of the Mozenda web scraping software. Mozenda's ingenious web scraping software may have been made by genius-like computer science engineers in some corner of the Netherlands but this software certainly does not take someone like Einstein to use. In fact, I believe that even an infant could use it. Hopefully you have an IQ higher than that of an infant.