I would say £15 or £20, the balls alone were £12.85 when I weighed them last. I'll see what the two are combined in a box. Depends on if the two together take it past the next threshold.
You realise the tank is out of test don't you? It costs about £35 to test, so I've been told, I'm not a paintballer myself.
@Russ4ll Those prices are fully insured, tracked and signed for.
If you're willing to take a chance and forgo some or all of these that would bring the postage price down dramatically.
What do you think?
£3 + £4 letter rate postage + Jiffy bag (no tracking, not signed-for) + £0.50p PayPal fees = £8
Tracked and signed for postage is £9 so that would be £3 + £9 + £0.70p = £13
Cheaper postage is at your risk but I will get a Certificate of Posting.