If you're new to the hobby then I'd advise against a sniper rifle as a first gun. They have a very steep learning curve and in order to achieve decent performance levels, you'll probably be used to seeing on YouTube, you'll be looking at a considerable investment in both money and time. Working on the assumption that you are new to the hobby then I'd suggest getting yourself a decent quality AEG, after renting to ensure you enjoy the hobby prior to investing.
As far as actual bolt action sniper options go the guys here have covered it pretty well. If you have some level of technical proficiency and don't mind getting your hands dirty then it maybe worth considering picking up a decent quality clone of the Tokyo Marui VSR-10 and investing in some performance upgrades. If you aren't comfortable working on it yourself then it maybe worth investigating Nobritch's options but bear in mind there are plenty of horror stories floating around relating to the quality of his customer service should you encounter issues.