Today, amongst a load of other price drops, you can get a cheap HTC Flyer at Dixons. They are offering the 16GB model and the 32GB 3G model for £199 and £249 respectively.
HTC have not mentioned the Flyer in the official list of devices due to get an upgrade to Ice Cream Sandwich, but you could just maybe hack it on. I’m sure at some point an un-official ROM will appear. There is already a leaked Honeycomb ROM for the Flyer that should keep you going in the mean time.