Don't assume that because you want just 2-3 pages it'll be any cheaper.
Most companies will be building on some kind of content management system (even if they don't actually give you access to it) so page count very rarely has any direct affect on price.
Cost will be driven by the design, and the initial cutup into HTML (web page code to normal folk)
Price then gets driven up depending on how bespoke and in depth the design gets on a per page basis and the subsequent extra development time.
But basically, a simple 1 page site won't really be any cheaper then a simple 2, 3 or 10 page.
You'll find someone who'll do it for £500 – it will be ropey though. From £2k – £3k for someone small but good.