I understand that.
Here's my point though. If you buy your MG7 for £129.99 and decide paintball isn't for you (unlikely) you can always try to sell it on the classifieds here, though you'd be lucky to get £50 for it. Shipped. In fact you may even not get that. You might get a couple of quid for the bottle it comes with IF you can sell it at all.
Buy a Mini or Ego 5 or similar for £150-200 and decide it's not for you, then you'll likely be able to sell it on for what you paid as it's not going to further depreciate in any significant way.
You're going through what all of us went through before you, buy a gun, need a better one very quickly, spend lots more money, can't sell original gun therefore original purchase is money completely wasted.
But hey, what would I know