Was that why you wanted me to retract your bid? Heh, it's not a flat padded envelope, these are two large boxes that have been packed properly with foam chips into a larger box for protection. I don't mess about, and the £7.50 is an accurate cost from Royal Mail as to what a package of this size costs to send. I prepack and preweigh I everything I list to Royal Mail guidelines. Sure, I could bung it in an envelope but I'm sure you'd be the first to complain if it was damaged in transit.
You'd be amazed the amount of stuff I've bought on eBay that's arrived in a padded envelope and has been squashed or broken. You'd want it in good codition right?
Bear in mind also that for some bizarre reason UK is a rip off country and we pay much higher prices for nearly everything than the USA. You guys get it lucky! 😉