Paranormal investigation isn't about having the most expensive tools, it's about having the right tools for the job. There will always be the temptation to buy an expensive piece of gear, and if you or your group can afford it then by all means go for it. But before you do I suggest careful consideration of your purchase. Is it a need or a want? Do you really need the equipment in your investigations or do you just want it for your investigations? If it is a need, and you can afford it then you should proceed with your purchase. But on the other hand if it is a want, then carefully consider the pro's and con's of making the purchase. Does the equipment provide significant gains in your investigations? How well has it been reviewed by others? If it doesn't provide any real gains or it hasn't been well reviewed or reviewed at all, hold off on the purchase. Also keep in mind the complexity of the equipment. Most of the time you will be in very dark conditions so the equipment should be easy to use in that situation.