You need to give us a bit more info. There are loads for that money but as different as chalk and cheese.
£200 will get you a 2240 with lots of money for a steel breech, silencer and a pistol scope and get it nicely sorted, its accurate and powerful. It will also get you a 2nd hand Umarex pistol that's less accurate and less powerful but multishot. You could also get a pair of 1911's that have no power and no accuracy but are unbeatable for fun plinking (until a BB comes back at you).
Great Deals with : Dave Dee, Dozy, Beaky, Mick & Tich