Best place to get deals on business PCs

Where can I find deals on good business computers?

I've look the normal places, best buy, HP, dell. Not as many deals on business PCs vs home obviously.

Any suggestions on where to look or what computer you would recommend?

Minimum requirements per our software platform:
Intel I5 or better
8GB or more
Windows 10 Pro 64 bit

All-in-one is preferred, buy tower and monitor is ok too.
Monitor 24in or more, touchscreen is preferred but not absolutely necessary.

Thanks!