The Arcam A85 continues to be a very popular choice for a stereophile HiFi amp, with excellent timing and insight - as long as it's partnered with the right speakers and source. I've had one from new, and have no plans to get rid of it - I'm just looking for some new speakers for it. They are not the most powerful 85W speaker in the world, and a lot of people end up getting a power amp - such as the matching P85 amp - to give them extra oomph and allow for bi-amping.
As for price - £299 sounds in the right ballpark - look on eBay, there's virtually always some for sale there, to check the prices. If possible, try to get one with the optional phono amp fitted, as this allows you to plug a turntable straight in.