Do I need my own broker/agent when I aready found a warehouse I'm interested in?

[Ken N]

Hi all,
I found a listing I am interested in, it's a warehouse, 25x100 (was used as a auto shop last)
Seems a warehouse should be pretty straight forward, since it's just a bare brick shell, right?
I'm debating if I should find a broker/agent to represent me before contacting the seller agent. I ask, cause previous agents I talked to, seem less knowledgeable then myself :( (and I'm not a pro)
And if I go without a buying agent, what should I be aware of in a commercial property deal like this?
Or should a commercial property lawyer already know and be able to help with this?

thanks