I don't know about 14 quid, but just about all the really good DC games are perfectly affordable. Sonic Adventure 1&2, Shenmue, Shenmue II (might be a little more expensive), Daytona 2001, MSR, Toy Commander (should be real cheap), RE: Code Veronica (for the RE fans), Virtua Tennis 1 or 2. Heaps more - but there is a lot of gameplay in that list.
There are practically no games that cost a real mint for the DC (like Radiant Silvergun for the Saturn). Check out eBay for a lot of reasonable prices.
Thats a decent price but I agree with klakalou that SA1 is overall a better game. I got SA1 for $15 Canadian unopened a year after its release and bought SA2 its first day out for around $60 CDN... and I liked Sa1 more
"the only really expensive game for dc is chuchu rocket with the controller "-megametalgreymon
The only thing I can think is that you've mistakenly put chuchu rocket in the place of Samba de Amigo, cause there is no chuchu rocket controller. Samba de Amigo has bitchin maracas that cost a lot so I'm pretty sure thats what hes reffering to. I shelled out $150 USD + shipping on ebay for 2 sets of maracas, don't regret it either.
as for games to look out for:
Rez, I can't get enough of this game....
Jet Grind Radio, better than the new xbox game IMO and simply amazing & original
Soul Calibur, harder to find but a launch title gem
Virtua Tennis, great fun (tennis, who'da thought). Still better than Tennis 2k2 IMO
Headhunter, great all around game
Toy Commander, I picked this up used cheap a couple of months ago and was quite impressed.
San Francisco Rush 2049, great multiplayer & arcady goodness
Samba de Amigo, even fun with normal controllers
I have so many more to mention but I haven't played my Dc in tooo long now, I think I'd better go do that
Maybe I should stock up, you can get Chuchu Rocket for about Â£1 here
Personally I preferred SA2 over the first one, mainly because there was none of that stuff between levels that really ruined the pace of it for me. I put in about 40 hours on SA2, but I was almost glad when I finished the first one.