Trial and error
Trial and error
I used Bid Clerk for a while, I also used a local plan room, occasionally Onvia Demandstar.
The trick with the services are if local contractors are also using them.
Ask around to local architects or government agencies and ask who they are listing with. Remember to look in the local paper notices section.
Try them out for a couple of months. See if its a good fit.
When you figure it out let me know.