A tin of pellets & re-charge of gun ?
Enjoy yourself dude, blat away, nice of 'em to put it like that seem decent folks, if it was me i would (& have)
done it for nowt, its just good crack! (sorry pest control)
Or maybe a couple of pints down the local.
Either way, I'm sure you will come to some agreement, keep us informed on your missions
matey
& Good Luck