Usually these guns retail anywhere between £50 to £70+ (£60 being the most standard price point) These toy guns are top of my kids Christmas wish list, so I was pleased to find this genuine half price deal. The deal makes the Zeus the same price as the entry-level manual model 'Rival Apollo' (RRP £29.99) which holds less rounds and is spring loaded.
The Zeus is a semi-automatic gun that can offload 12 rounds (foam Nerf balls) in quick succession thanks to the motorised loading and battery system. It's the closest thing to paintball your kids can experience at home. You can also purchase paintball-esque safety masks separately (I found these cheapest on Smythstoys.com) Recommended for ages 14+, but I have seen children on Youtube much younger using with them without issue. Choose Team Red or Team Blue (I reserved a few and then requested to view the ones they had in stock so that I could select the colours I wanted)
At the time of writing there seems to be a fairly decent amount of stock out there, but as with anything - popularity will lead to shortages.