Don't visit the musical instrument store

It's twice now that I go to guitar shops at lunch and make major purchases. Yesterday, bought a midi pickup and pedal/synth set. What could I do? We were looking at getting such an interface to fill the sound, and the store had 2 used versions of Roland midi pickups, one with a rack mounted synth and the other with a pedal synth. I got the pedal. We actually left the store without buying then went back (demi-tour) and tried it, with intention to buy. The response time is quite good, latency is not perceptible although style of playing has to be adapted, has to become more melodic since guitar chord strums sound like arpeggios when translated to keyboard sounds. The last time I bought an effects guitar: X guitar by Alesis. Both were (sort-of) necessary, but it is feeling like a dependency.