I will second the smk pr900w mine has proved excellent in the past 12 months. Picked it up for £160 new with a bag from a dealer in essex (he still has them in his catalogue). I fill from a pump but the res being small its no effort. Matched it with a hawk scope for £40 off ebay and a surprisingly good NV kit from ali express for another £40 and its perfect for ratting and rabbits round the farm. Its quiet enough and small and light enough for my 10 year old daughter to use. It is accurate and there is loads of info on simple fine tuning but I have not bothered as it already shoots better than I can.