1k GBP is an absurdly high price I'd say. If you want this to be live in game, the jetpack should be tied to certain conditions that'd allow you to access it.
1. Unwanted
2. /war /assist disabled
3. Disallowing picking up the VIP
4. Disallowing SR circle progress
5. Disallowing player damage (this could be used as a rule instead of a script, to provide more flexibility and comfort for whomever is rich enough to help the server with such amount((cases where one wants to DM with his friends)). Should the player break that rule, the perk is stripped off of the donator for misuse)
And whatever else that may affect the gameplay