Hi and welcome,
If you want to get into sniping I recommend buying a JG BAR 10 from Taiwan gun for £75 + p&p.
then look at ASPUK, they sell some good value sniper upgrades that will make your rifle perform at a competitive level and 500fps.
you can send it to them and they will upgrade for you, however i suggest doing it your self i recently upgraded my JG BAR 10 and its very very simple.
L96's are also very up-gradable ASPUK also sells various parts for those aswell, the best model is probably the TM L96 but I think the WELL one is 'ok'.