From postoffice.co.uk:

Welcome to the Post Office® website – offering you a range of products from Post Office® Broadband, travel insurance and car insurance to life insurance and Instant Saver.

I’ve heard they do stamps too…

Ok, ok. They do mention that, but only right at the end.

I’m almost prepared to forgive them for trying to sell me life insurance before selling me postage just for the fact that they have an entire section of the site for people selling items on eBay.

Good move.