A bit of info on IPG tickets.....
These are sold in the street as a 'discount buy now' ticket. The buyer gets a discount compared to the IPG online price of £30, (Book of 10 for £300) he probably paid £6.99 per ticket in the street (£69.90)
To use the tickets you then have to book with IPG for a Delta Force site at £9.99 for the booking and 100 paintballs
(£99.90 for 10 people)
http://www.ipgvip.com/how-it-works/
£16.98 each
Alternately you book directly with Delta Force for
You could book directly with delta force at £9.99 entry and £7.99 for your first 100 paintballs
£17.98 entry, which means as long as you didn't use the fake £30 IPG starting price it's cost you £1 more each for two of you then having to book 10 of you
You can how ever get similar prices, probably a little cheaper on the paintball prices which really matter with a less deceptive brand like skirmish etc
If he has been mis-sold tickets by the seller (they lied as opposed to just quoting the 'saving compared to £30' then he can pursue a refund from IPG and use trading standards
Find a local independent site and call for a chat
For a realistic estimate aim for 500 paintballs each for the day and ideally prebook with a site for entry with 500 each and budget to buy another 500 between you if you're having a great shooting day
There is a thread on here titled 'what paintball costs', search it out for a rough guide to pricing for punter paintball
(I promise that there will be an update to it in the near future!!!)