if u mean N95, then nowhere cheap, the handset is around £400-£500. If you are talking about a different phone then i dont know, but i got the N95 today, i pay £35 a month and still had to pay over a £100 for the phone, but well worth it.
sim free, unlocked without the bell's and whistles, just a fone http://www.expansys.com/p.aspx?i=146154
£269.95
i bought my n91 from here 3 months before it came out in the uk