Seriously? You can get a standard 0.8l steely tank for £40. For a scuba tank with the right fill rigs for a paintball tank you are looking at £100+. The thing would probably cost £40 to post anyway!Well either 3000psi or 4500psi not boverd really. 3000psi would do just fine. And not sure look to spend around £30-40 or more.