[quote name='Earbrass' timestamp='1465766742' post='3070877']
My usual rule is: wait a month. If you still really want it, get it. If you're lusting after something else by then, it was never meant to be.
[/quote]
This is a good rule. I usually end up doing this, but most of the time due to funds.
Most of my gas tends to be pedal gas, which is cheaper/easier to store (on a pedal by pedal basis) but does come with a lot of boring infrastructure problems (power supplys, loop pedals, bigger boards etc).